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Motorcycle

Imme R 100,Germany, 1948/1949 A 125 cc motorcycle, the Italian-manufactured Cagiva Planet. Motocross racing bikes

A motorcycle is a two-wheeled vehicle powered by an engine. The wheels are in-line, and at higher speed the motorcycle remains upright and stable by virtue of gyroscopic forces; at lower speeds continual readjustment of the steering by the rider gives stability. The rider sits astride the vehicle on a seat, with hands on a set of handlebars which are used to steer the motorcycle, in conjunction with the rider shifting his weight through his feet, which are supported on a set of footpegs which stick out from the frame.

History

Replica of Daimler-Maybach Reitwagen

The inspiration for the earliest motorcycles, and arguably the first motorcycle, was designed and built by the German inventors Gottlieb Daimler and Wilhelm Maybach in Bad Cannstatt (a city district of Stuttgart) in 1885. It was the first petroleum-powered vehicle ever and, but for the provision of a pair of stabilizing wheels, a motorized bicycle, although they called their invention the Reitwagen ("riding car"). They had not set out to create a vehicle form but to build a simple carriage for the engine which was the focus of their endeavours. However,if one counts two wheels with steam propulsion as being a motorcycle, then the first one may have been American. One such machine was demonstrated at fairs and circuses in the eastern US in 1867, built by one Sylvester Howard Roper of Roxbury, Massachusetts. There is an existing example of a Roper machine, dated 1869. It's powered by a charcoal-fired two-cylinder engine, whose connecting rods directly drive a crank on the rear wheel. This machine predates the invention of the safety bicycle by many years, so its chassis is also based on the "bone-crusher" bike.

In 1894, the Hildebrand & Wolfmüller was the first motorcycle that was available for purchase.

In the early period of motorcycle history there were many manufacturers as producers of bicycles adapted their designs for the new internal combustion engine. As the engines became more powerful and designs outgrew the bicycle origins, the number of motorcycle producers reduced.

2002 Harley-Davidson Heritage

Up until the First World War, the largest motorcycle manufacturer was Indian. After that, this honour went to Harley Davidson, until 1928 when DKW took over as the largest manufacturer. After the Second World War, in 1951, the BSA Group became the largest producer of motorcycles in the world. The German NSU was the largest manufacturer from 1955 until the 1970s when Honda became the most prominent manufacturer, a title it retains to this day. British manufacturers held a dominant position in some markets until the rise of the Japanese manufacturers (led by Honda) in the late 1960s and early 1970s who were able to produce designs faster, cheaper and of better quality. Today, the Japanese manufacturers Honda, Kawasaki, Suzuki and Yamaha dominate the motorcycle industry, although Harley-Davidson still maintains a high degree of popularity in America.

Recent years have also seen a resurgence in the popularity of many other brands, including BMW, Triumph and Ducati.

Construction

Variations

Variations exist:

  • There are three basic forms of motorcycles: offroad, street and dual-purpose.
  • Some motorcycles have floorboards instead of footpegs.
  • Some motorcycles can be fitted with a sidecar, this converting it into a 3-wheeler or "hack".
  • There are other 3-wheeled variations, commonly referred to as a trike or motortricycle.
  • Motorcycle manufacturers often also produce All-terrain vehicles or ATVs. These have two or more back wheels, usually two front wheels, an open driver's seat and a motorcycle-type handlebar. (Early models had a single front wheel, but these were prone to rollovers.) ATVs are used off-road for utility and recreation. However, a proper motorcycle has fewer than four wheels in contact with the ground.

Chassis

A British motorcycle from 1966, the 250 cc Ariel Leader

The chassis (or frame) of a motorcycle is typically made from welded aluminium or steel (or an alloy) struts, with the rear suspension being an integral component in the design. Carbon-fiber is used in a few very expensive custom frames.

Some motorcycles include the engine as a load-bearing (or stressed) member; this has been used all through bike history but is now becoming more common.

The fuel tank is usually mounted above the engine. This tank is generally made of stamped, brazed or welded sheet metal, or blow molded high-density polyethylene. At least one motorcycle manufacturer (Buell) offer models that use a hollow frame as the fuel tank, and various manufacturers offer designs which use part of the frame as an oil reservoir. The wheel rims are usually steel (generally with steel spokes and an aluminium hub) or 'mag' type cast or machined aluminum. Performance racing motorcycles often use carbon-fiber wheels, but the expense of these wheels is prohibitively high for general usage.

A plastic or fiberglass shell, known as a fairing, is placed over the frame in some models to shield the rider from the wind. Drag is the major factor that limits motorcycle speed, as it increases at the square of the velocity, with the resultant required horsepower increasing with the cube of velocity. As can be seen from the streamlined appearance of new performance motorcycles, there is much aerodynamic technology included in the design, but unfortunately no one has been able to overcome the effect from the turbulence caused by the spinning front wheel which disallows the motorcycle from cutting a clean path through the air. Another problem is the fact that no designs have been discovered that can improve aerodynamic performance without unacceptably compromising the rider's ability to control the machine. In the absence of a fairing or windshield, a phenomenon known as the windsock effect occurs at speeds above 100 km/h, where the rider becomes a major source of drag and is pushed back from the handlebars, tiring the rider. However, these motorcycles still effectively push their way through the atmosphere with brute force.

Cabin cycle solved the problem of aerodynamics by isolating driver from outside air.

Chassis stability

Sportbike (Ducati 916)

There could be three kinds of stability problems with motorbikes:

  • Capsizing is well known in low speeds, and easy to overcome by the rider using their feet support themselves.
  • Wobbling (AVI movie) is a high frequency (7-9 Hz) oscillation of the front wheel. It is often relatively harmless but annoying (and quite frightening if previously inexperienced). It can appear at moderate speeds.
  • Weaving (AVI movie) is a low frequency (2-3 Hz) oscillation of the whole vehicle. It can become unstable at higher speeds with fatal results.

Based on The control and stability analysis of two-wheeled road vehicles:

  • The weave oscillations damp out once the rider reduced the roll angle.
  • Tyre (tire) characteristics and inflation pressures are important variables in the behaviour of the motorcycle at high speeds.
  • From a stability point of view it is desirable to make the lateral stiffness as large as possible, with the possibility of an optimum value for the torsional stiffness of the rear frame.
  • Common levels of lateral stiffness at the wheel spindle deteriorates the wobble mode damping substantially with significant changes in the wobble frequency as well, and slight reduction in the weave mode damping at high speeds.
  • Lateral distortion should be opposed as much as possible by locating the front fork torsional axis as low as possible.
  • The largest contribution to the weave damping came from the cornering and camber stiffnesses and relaxation length of the rear tyre and not so much from the same parameters of the front tyre.
  • Amongst others, stiff frames, a long wheelbase, a long trail and a flat steering head angle were found to increase weave mode damping.
  • Degraded damping of the rear suspension, rear loading and increased speed amplifies cornering weave tendencies.
  • Rear load assemblies with appropriate stiffness and damping were successful in damping out weave and wobble oscillations.
Motorcyclists on a Honda CB600F Hornet.

Suspension

Modern designs have the two wheels of a motorcycle connected to the chassis by a suspension arrangement, however 'chopper' style motorcycles often elect to forego rear suspension ("rigid frame").

The front suspension generally consists of sliding steel tubes with long springs inside called forks which use hydraulic fluid for damping shock absorbers. The front fork is the most critical part of a motorcycle. The angle of rake determines how controllable the steering is. The rake should be chosen so that precessive force from countersteer and body steering slightly overbalance the leaning forces from the weight of the bike, at a speed near the running speed of a person. This is the speed at which the rider's feet can no longer be safely used to balance the bike.

The rear suspension supports the swingarm, which is attached via the swingarm pivot bolt to the frame and holds the axle of the rear wheel. The rear suspension can consist of several shock arrangements:

  • dual shocks, which are placed at the far ends of the swingarm
  • traditional monoshock, which is placed at the front of the swingarm, above the swingarm pivot bolt
  • 'Softail' style monoshock, which is mounted horizontally in front of the swingarm, below the swingarm pivot bolt

Brakes

There are generally two independent brakes on a motorcycle, one set on the front wheel, controlled by the right hand lever, and one on the rear controlled by the right foot. In older motorcycles the rear may be on the left foot. However, several models have "linked brakes" which apply both at the same time, although one more than the other. The front brake is generally much more powerful than the rear as roughly 2/3rds of stopping power can come from the front brake when properly applied and in some cases 100% depending on the model of motorcycle and operator; rear wheels can generally lock and skid much more easily than the front due to weight distribution dynamics. Brakes can either be drum or disc based, with disc brakes being more common on large, modern or expensive motorcycles for their far superior stopping power, particularly in wet conditions. There are many brake performance enhancing aftermarket parts available for most motorcycles including brake pads of varying compounds and steel braided brake lines. Some manufacturers have created Antilock braking systems (ABS).

In virtually all cases, 70% to 90% of total braking force should be applied by the front brake when operated on a hard surface such as tarmac, with the remainder being simultaneously applied to the rear brake. Riders fear that aggressive use of the front brake will stop rotation of the tire and cause loss of control, or a skid, and therefore often fail to use the front brake to its full potential. Another common misconception is that application of the rear brake will cause motorcycle instability. The phenomenon known as a "stoppie" may only be achieved if the front brake is used aggressively with no application of the rear brake; if sufficient force is applied to the front brake, the rear of the motorcycle chassis will lift off the roadway, while the bike continues to move forward on the still-rotating front wheel. This is a highly skilled (and generally illegal) maneuver which requires practice to perfect. Trailbraking is a term used to describe carrying the braking action of a vehicle past the turn entry, allowing the rider to adjust speed all the way through a turn to the apex. Another variation of brake use can be seen at top level motorcycle roadracing and motorcross events. The technique of steering the motorcycle in a high speed turn (or lower speeds on a dirt course) using the rear brake is called "backing it in" (or "turning" on dirt). Racers while hard on the front brake will feather the rear brake just enough to start a controlled rear slide, thus rendering a sharper turn angle. Note: This technique is not recommended for public road use.

Engine

Motorcycles have, over time, been powered by an extraordinary array of engines, from very early models powered by steam, to the ubiquitous gasoline engines of today.

Transmission

The transmission is controlled by a clutch lever under the left hand in standard configurations, a twistgrip throttle on the right handlebar and a gear lever at the left foot.

The gear lever operates by shifting gears when it is pressed or lifted. A normal street motorcycle is put in first gear by pressing the gear lever, while second and all further gears are reached by lifting it. Downshifting is done by pressing the gear lever. Neutral sits between first gear and second, so a small lift out of first causes the gearbox to change into neutral, but a large movement causes the gearbox to change into second gear. In contrast, racing motorcycles have all gears arranged "below" the first gear, thus pressing the gear lever always shifts up, while lifting it shifts down.

Modern motorcycles normally have five or six forward gears. Only the largest touring motorcycles (most prominently, the Honda Goldwing) and a few models that are routinely used with a sidecar are fitted with a reverse gear.

The clutch is typically an arrangement of plates stacked in alternating fashion, one geared on the inside to the engine, and next geared on the outside to the transmission input shaft. Whether wet (rotating in engine oil) or dry, the plates are squeezed together by a spring, causing friction buildup between the plates until they rotate as a single unit, driving the transmission directly. A lever on the handlebar, through a cable or hydraulic arrangement, uses mechanical advantage to release the clutch spring, allowing the engine to freewheel with respect to the transmission.

The most commonly used transmission is a sequential gearbox. From neutral, you may select either first or second gear, but higher gears may only be accessed in order - you may not shift from second gear to fourth gear, without shifting through third gear. Internally, a rotating cam on the shift lever operates cogs on two counter-rotating shafts carrying a variety of gears. One shaft is geared to the final drive mechanism, and the other to the clutch. Operating the shift lever slides individual gears on one shaft, to intersect with a matching gear on the other. The small mass of the whole arrangement allows for extremely quick gear changes. Also, gear synchronizers typically found in passenger cars with manual transmissions are not necessary. The two shafts are always geared together (except in neutral), always spinning at a speed nearly approximating the next higher or lower gear ratio. Aided by beveled edges on the gears, shifting gears is simple for novices - no double clutching or grinding of gears. Advanced drivers can perform "full-throttle upshifts" on racing mounts, but this risks both the warranty and mechanical integrity.

Final drive from the gearbox to the rear wheel is typically accomplished with a chain, which requires both lubrication and adjustment for elongation (stretch) through wear. The lubricant is subject to being thrown off the fast-moving chain and results in grime and dirt buildup. Chains do deteriorate, and excessive wear on the front and rear sprockets can be dangerous. Many motorcyclists replace the chain and both sprockets as a set to maintain efficiency and safety. Many manufacturers offer cruiser models with final drive options of a belt, or a shaft. A belt drive is still subject to stretch, but operates very quietly, cleanly, and efficiently. However, belt drives are limited in the amount of power they can transmit. The belt is frequently toothed. A shaft drive is completely enclosed, the visual cue is a tube extending from the rear of the transmission to a bell-housing on the rear wheel. Inside the bell housing a bevelled gear on the shaft mates with another on the wheel mount. This arrangement is superior in terms of noise, cleanliness, and is virtually maintenance free. However, the additional gearsets are a source of power loss and add to bike weight.

Tires

Motorcycles use pneumatic tires ('tyres' in the UK) which come in many configurations, the most important part of any being the contact patch. That is the small area that is in contact with the road surface while riding.

There are tires designed for dirtbikes, touring, sport and cruiser bikes. Dirtbike tires have knobby, deep treads for maximum grip on loose dirt, mud, or gravel — such tires tend to be less stable on paved surfaces. Touring tires are usually harder rubber and last longer but provide less grip (significantly less grip while cold, and the heavier rubber takes longer to warm up), while sport/performance tires provide amazing grip but may only last 1,000 miles (1,600 km) or less. Cruisers and "Sport Touring" tires try to find the best compromise between grip and durability. Some cruiser tires have raised white lettering on the sidewalls as a "retro" detail.

Tires should be maintained at the proper air pressure at all times; tire pressure is critical, the difference of a few PSI can have a dramatic impact on the handling and longevity of the tire. Tires usually have an average life expectancy of about four to five years from date of manufacture; as mentioned above, mileage is also a factor, with many street tires having a service life between 3,000 and 10,000 miles. Small cracks on the sidewall or bald spots on the tread are an indicators of the need to replace the tire.

Motorcycle tires can also be found in "race compounds". However, race compound tires should NOT be used in street applications. Race compounds are designed specifically for the short life and few heat cycles of a race environment, where street tires are designed for multiple heat cycles and use in a street environment. In most cases street riders will actually achieve higher levels of performance using street tires than race compounds.

If a tire loses grip or goes flat, the rider may crash and make contact in a rather forceful (and very possibly a painful) manner with the road or other obstacles. The motorcyclist must, therefore, consider proper motorcycle attire such as helmet ("full-face" providing the most protection), gloves, boots, and leather or synthetic protective clothing. Wearing a t-shirt, shorts, and sandals on a motorcycle is not advised. The use of an approved helmet is required by law in many countries (or individual localities therein).

Performance

Motocross racing bike

The most efficient way to improve the handling and speed of a motorcycle is via increased operator skill. By attending riding schools and increasing rider education levels, a motorcyclist will be able to ride more skillfully and, thus, more safely. Even experienced riders can benefit from top-level instructors helping to fine-tune their skills, as well as the opportunity to practice crash-avoidance techniques in a more controlled environment (and without risking one's own motorcycle).

The next-most-common cause of loss of speed is one of the easiest to remedy: rolling resistance. The right tires kept at the proper pressure will contribute to both speed and safety.

On the engine, keep the air filter and drive chain (or drive belt) clean, use high-quality lubricants and fuel with precisely-tuned spark plugs, air / fuel mixture, and timing. This is obvious, but often neglected.

Engine modifications can yield appreciable performance improvements, but this is often costly and very time-consuming. Improper attempts at tuning can yield benefits in one particular part of an engine's power band, while impairing performance everywhere else, provoking a net loss of power or handling. Blueprinting, or meticulous restoration of an engine to (or beyond) factory tolerances can help to improve an engine's efficiency and restore power that would otherwise be lost. Enlarging cylinder head ports, while common practice amongst many tuners, is often unnecessary (unless a big-bore kit has been fitted) to the extent that many engines benefit from decreasing the volume in the cylinder head. Done correctly, this increases the velocity of the fuel / air mixture entering the cylinder, packing more mixture in per revolution.

More usable improvements can be had by improving and upgrading suspension components. Suspension is typically the one element of the motorcycle that will receive the least amount of engineering attention from the factory. Replacing stock shocks and fork springs as well as changing damping and valving rates will result in dramatic improvements in motorcycle stability and increased speed and rider confidence as a result.

Another way to increase performance is to install a tuned exhaust system. This helps evacuate the exhaust from the engine more rapidly, and permits a longer power-stroke. However many modern production bikes already have tuned exhausts. A "custom" tuned exhaust will often operate only at a narrower range of engine RPM, and therefore more suited to more specialised applications, usually racing (road or drag).

Aftermarket exhaust systems are usually louder, by varying degrees, than stock systems. Most countries have limits on how much noise can legally be produced by vehicles, however this usually does not deter motorcyclists from fitting louder exhaust systems. There is even a school of thought that louder systems are safer, as they attract the attention of (car) drivers, who might otherwise have failed to notice the motorcyclist.

One of the most effective ways of increasing power is forced induction. Turbochargers are generally more effective than superchargers because turbos spin using the exhaust gases while a supercharger uses engine power to spin it directly (usually via a belt system), robbing power. Since more air is being forced into the engine, the air/fuel ratio must be changed to prevent the engine from running lean [and potentially destroying itself]. On low boost settings, the turbocharger can increase power and fuel range. Engine internals such as pistons and connecting rods must be replaced with stronger ones for all but the smallest boost. In addition, the compression ratio must be considered and adjusted accordingly, as an "overboosted" engine will destroy itself as well. However, due to the special motorcycle dynamics, turbochargers are rarely used on production bikes.

With great care, an engine can be helped to "sprint" by injecting small amounts of nitrous oxide (N2O). The main benefits of nitrous oxide are three-fold —

  • More oxygen is introduced into an engine's combustion chamber
  • As nitrous oxide is stored in liquid form, it is still very cold when it evaporates and is mixed with fuel. This chilling effect raises the density of the mixture, packing more fuel and oxygen into the combustion chamber.
  • This colder mixture helps to keep the engine running cooler, which is very useful as nitrous oxide is almost exclusively used in stressful, high RPM situations, primarily drag racing.

Engines using large amounts of nitrous oxide need precise mixtures and/or configurable timing and carburation. It's very easy to blow the head gaskets or burn the valves of the engine with careless nitrous oxide injection. Using methods like nitrous oxide are fine on dragstrips, but while not illegal, can be very dangerous on the street. In any case, a canister of nitrous oxide is rapidly expended, and impractical for sustained use on a road-going bike by any sane rider.

Instruments

Almost all motorcycles have a speedometer, an odometer and a tachometer. Fuel gauges are becoming more common, however traditionally a reserve tank arrangement has been used with a petcock on the side of the motorcycle allowing the rider to switch to a reserve fuel supply when the main fuel supply is exhausted; this is typically done while the vehicle is in motion. There is not actually a separate reserve tank, the intake for the petcock has two pipes, one extending higher into the fuel tank than the other, when fuel no longer covers the long pipe the rider switches to the shorter pipe. Riders without a fuel gauge usually learn how many miles / km they can do with a full tank of fuel, and then use a trip meter if available to judge when they must refill the tank.

Motorcycle types

Motorcyles have been built in myriad different models for innumerable different purposes. For a complete discussion of contemporary motorcyle types, see the main article: types of motorcycle

Safety

Motorcycles have a far higher rate of crippling and fatal accidents per unit distance than automobiles. According to the US Highway Safety Authority, in 2002 20.9 cars out of 100,000 ended up in fatal crashes. The rate for motorcycles is 66.7 per 100,000. Given that motorcycles cover less distance than cars per year on average, the figure per unit distance is likely to be much worse. Most of these accident are caused by car drivers though who tend to underestimate the speed and acceleration of motorcycles or simply overlook them.

For a complete discussion, see the main article: Motorcycle Safety

Culture

Gangs and counter-culture movements

Across the world, and both past and present, motorcycles have been associated with subcultures of society. Some of these subcultures have been loose-knit social groups such as the Cafe racers of 1950s Britain, and the Mods and Rockers of the 1960s. Others are purportedly fraternal organizations, the most well known of these being the Hells Angels. Most motorcycle organizations have law-abiding and peaceful members, and many raise money for charities through organized events and rides. Gangs represent far less than 1% of motorcyclists.

Risk taking

Motorcycles are typically more agile, can accelerate more quickly, and are generally perceived to be more fun to ride than an average car. Because of this, they sometimes attract people — typically, but not exclusively, young men — with a propensity to take great risks or behave dangerously and anti-socially. These people contribute significantly to the fatality and injury rates of motorcyclists. See also: Squid_(motorcycle) Hooligan

The U.S, U.K. and Europe are also seeing a surge in motorcycle ownership, thanks in large part to an older demographic, people in their 40's and 50's. Many of these riders are either new to the sport, or have not been on a motorcycle for many years; they would benefit from rider training as much or more so than any new rider. A substantial increase in the number of riders (regardless of age) indicates a greater number of inexperienced riders, who are more likely to be involved in accidents. See Born again biker.

It has been theorized based on data, that humans have some innate need for risk. The upsurge in extreme sports and hobbies coincides with the upsurge in workplace and home safety.

Public perception

In less developed nations, motorcycles are often the only motorized transportation affordable to the majority of the population. In much of the developed world, motorcycles are thought of as a cheap and efficient means of transportation, but they are tainted by a stereotype of riders as anti-social and reckless, even though the majority are safe and law-abiding.

This is because the very small number of events where a non-motorcyclist is offended by a motorcyclist (perhaps by excess exhaust noise, reckless behaviour, or news reporting of a motorcycle gang incident) are amplified in popular thought. This phenomenon is known by sociologists as availability error, and all minority groups in society tend to fall afoul of it.

In American speech, the term biker has come to be associated with members of the gangs described above. Many of those who ride motorcycles prefer the more neutral terms "rider" or "motorcyclist." In Australia and New Zealand the word "bikie" is used instead of "biker".

Often, motorcyclists just love the thrill of traveling the world on the back of a bike. In an article called, "Arizona Road Trip Fulfills Lifelong Dream," a Massachusetts man travels all over Arizona on a Harley Davidson Dyna Low Rider and explains the joy of his trip. He encourages more people to engage in such an experience.

Clannishness and brand loyalty

Like most minority cultures, motorcyclists in developed countries "stick together." Most cities have several bars and hangouts where riders congregate. When riders pass each other in the opposite direction, riders often wave or nod. Riders will sometimes stop and help if another rider has broken down.

Within motorcycle culture, people congregate around brand names, type of bike, and individual models.

Brands

There are many brands of motorcycles currently produced as well as vintage brands which can be found here List of motorcycle manufacturers

Clubs

Most manufacuturers subsidize a club to foster a sense of community between, provide services to, and make money from the owners of their bikes. Such clubs include:

  • Boss Hoss Riders Association
  • Yamaha Owners Club
  • Harley Owners Group (HOG)
  • Riders of Kawasaki (RoK)
  • Honda Owners Club
  • Suzuki Intruder-Boulevard Owners Club

Groups also organise themselves to offer support and advice.

  • V4HondaBBS
  • [1]
  • Katriders
  • FJRForum
  • East Coast Bikers Forum
  • The Single Overhead Cam Owners Club dedicated to SOHC4 Hondas

BMW Motorrad has no national owners clubs, but, uniquely, has many independent clubs in different countries, such as BMW Motorcycle Owners of America (BMWMOA) and BMW Riders Association (BMWRA).

Types

Many interest groups form around a particular type of riding or style of bike:

  • Track Racing (sport bikes)
  • Classic Racing (Racing bikes from an earlier era)
  • Street Racing (sport bikes)
  • Cruising (cruisers, or motorcycles that resemble Harley-Davidson models)
  • Touring and Motorcycle camping (touring and dual-sport bikes)
  • Extreme Distance Events (competitive long distance riding, including Iron Butt events)
  • Adventure Touring (dual-sport bikes) Ontario Dual Sport Club
  • Minibikes or Pocket-Bikes as used in Pocketbike racing

Rallies

  • Daytona Bike Week [2]
  • Laconia Motorcycle Week [3]
  • Port Dover Friday the 13th [4]
  • Sturgis Motorcycle Rally [5]
  • Parry Sound Sportbike Rally

This page about Motorcycle includes information from a Wikipedia article.
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Many interest groups form around a particular type of riding or style of bike:. In 1898, when New York City was consolidated into its present form, all previous town and county governments within it were abolished in favor of the present five boroughs and unified, centralized city government. BMW Motorrad has no national owners clubs, but, uniquely, has many independent clubs in different countries, such as BMW Motorcycle Owners of America (BMWMOA) and BMW Riders Association (BMWRA). Towns in New York State, on the other hand, are organizationally more like New England townships. Groups also organise themselves to offer support and advice. Towns, which are county subdivisions in New York State with governments of their own, can also contain villages, which are roughly comparable to what is thought of as a town in most of the United States; that is, villages are small incorporated muncipalities with limited taxation powers. Such clubs include:. Those living outside of cities in New York State automatically live inside towns.

Most manufacuturers subsidize a club to foster a sense of community between, provide services to, and make money from the owners of their bikes. In most of New York State, political subdivisions such as cities are contained within counties. There are many brands of motorcycles currently produced as well as vintage brands which can be found here List of motorcycle manufacturers. The court system in New York is notable for its "backwards" naming: the state's trial court is called the New York Supreme Court, while the highest court in the state is the New York Court of Appeals. Within motorcycle culture, people congregate around brand names, type of bike, and individual models. New York State has its counties pay a higher percentage of welfare costs than any other state and New York State is the only state which requires counties to pay a portion of Medicaid. Riders will sometimes stop and help if another rider has broken down. For decades it has been the established practice for Albany to pass legislation for some meritorious project, but then mandate county and municipal government to actually pay for it.

When riders pass each other in the opposite direction, riders often wave or nod. Far from unique to New York State, and actually fairly common in English-speaking countries, public benefit corporations give the state the opportunity to carry out economic goals and infrastructure maintenance, while making risky investments that don't put the state's credit on the line. Like most minority cultures, motorcyclists in developed countries "stick together." Most cities have several bars and hangouts where riders congregate. The New York Times, for instance, has come to see many of them as obsolete and wasteful, even going so far as to refer to them a shadow government. He encourages more people to engage in such an experience. Some of New York's public benefit corporations have come under fire in recent years. In an article called, "Arizona Road Trip Fulfills Lifelong Dream," a Massachusetts man travels all over Arizona on a Harley Davidson Dyna Low Rider and explains the joy of his trip. The most famous examples are probably the Metropolitan Transportation Authority, which oversees New York City's subway, and the Port Authority of New York and New Jersey (actually a bi-state agency).

Often, motorcyclists just love the thrill of traveling the world on the back of a bike. Many of New York's public services are carried out by public benefit corporations, frequently known as authorities or development corporations. Many of those who ride motorcycles prefer the more neutral terms "rider" or "motorcyclist." In Australia and New Zealand the word "bikie" is used instead of "biker". Other officially incorporated governmental units are towns, cities, and villages. In American speech, the term biker has come to be associated with members of the gangs described above. New York's subordinate political units are its 62 counties. This phenomenon is known by sociologists as availability error, and all minority groups in society tend to fall afoul of it. New York's legislature also has more committees than any other legislature in the nation.

This is because the very small number of events where a non-motorcyclist is offended by a motorcyclist (perhaps by excess exhaust noise, reckless behaviour, or news reporting of a motorcycle gang incident) are amplified in popular thought. Pennsylvania, whose staff is the second largest, only has 2,947, and California only 2,359. In much of the developed world, motorcycles are thought of as a cheap and efficient means of transportation, but they are tainted by a stereotype of riders as anti-social and reckless, even though the majority are safe and law-abiding. New York's legislature also has more paid staff (3,428) than any other legislature in the nation. In less developed nations, motorcycles are often the only motorized transportation affordable to the majority of the population. In 2004, over 17,000 bills were introduced. The upsurge in extreme sports and hobbies coincides with the upsurge in workplace and home safety. Of those bills, only 4 percent (693) actually became law, the lowest passing percentage in the country.

It has been theorized based on data, that humans have some innate need for risk. In 2002, 16,892 bills were introduced in the New York legislature, more than twice as many as in the Illinois General Assembly, whose members are the second most prolific. See Born again biker. The state ranks at the bottom, in 42nd place, in federal spending per tax dollar. A substantial increase in the number of riders (regardless of age) indicates a greater number of inexperienced riders, who are more likely to be involved in accidents. New York state receives 82 cents in services for every $1 it sends to Washington in taxes. Many of these riders are either new to the sport, or have not been on a motorcycle for many years; they would benefit from rider training as much or more so than any new rider. The state has a strong imbalance of payments with the federal government.

and Europe are also seeing a surge in motorcycle ownership, thanks in large part to an older demographic, people in their 40's and 50's. The top zip code, 10021 on the Upper East Side, generated the most money for the 2000 presidential campaigns of both George Bush and Al Gore. The U.S, U.K. Four of the top five zip codes in the nation for political contributions are in Manhattan. See also: Squid_(motorcycle) Hooligan. New York City, however, is the most important source of political fundraising in the United States. These people contribute significantly to the fatality and injury rates of motorcyclists. Because New York state consistently votes Democratic in national elections, many observers argue the state is insignificant in presidential contests.

Because of this, they sometimes attract people — typically, but not exclusively, young men — with a propensity to take great risks or behave dangerously and anti-socially. Heavily populated suburban areas such as Westchester County and Long Island usually hold the power in determining state elections and tend to favor Republicans at the state level and Democrats at the federal level. Motorcycles are typically more agile, can accelerate more quickly, and are generally perceived to be more fun to ride than an average car. However, upstate New York, especially in rural areas, is generally more conservative than the cities and tends to vote Republican. Gangs represent far less than 1% of motorcyclists. Many of the state's other urban areas, including Buffalo, Rochester, Syracuse, and Utica are also Democratic. Most motorcycle organizations have law-abiding and peaceful members, and many raise money for charities through organized events and rides. New York City is a major Democratic stronghold with liberal politics.

Others are purportedly fraternal organizations, the most well known of these being the Hells Angels. Presidential candidate John Kerry won New York State by 18 percentage points in 2004. Some of these subcultures have been loose-knit social groups such as the Cafe racers of 1950s Britain, and the Mods and Rockers of the 1960s. New York state consistently supports Democratic candidates in federal elections. Across the world, and both past and present, motorcycles have been associated with subcultures of society. From 1984 through 2004, no budget was passed on time, and for many years the legislature was unable to pass legislation for which there was supposed to be a consensus, such as reforming the so-called Rockefeller drug laws. For a complete discussion, see the main article: Motorcycle Safety. The Assembly has long been controlled by the Democrats, the Senate has long been controlled by the Republicans, and there is little change in membership election to election.

Most of these accident are caused by car drivers though who tend to underestimate the speed and acceleration of motorcycles or simply overlook them. New York's legislature is notoriously dysfunctional. Given that motorcycles cover less distance than cars per year on average, the figure per unit distance is likely to be much worse. Unlike most States, the New York electoral law permits electoral fusion, and New York ballots tend to have, in consequence, a larger number of parties on them, some being permanent minor parties that seek to influence the major parties and others being ephemeral parties formed to give major-party candidates an additional line on the ballot. The rate for motorcycles is 66.7 per 100,000. The legislative branch is called the Legislature and consists of a Senate and an Assembly. According to the US Highway Safety Authority, in 2002 20.9 cars out of 100,000 ended up in fatal crashes. As in all fifty states, the head of the executive branch of government is a Governor.

Motorcycles have a far higher rate of crippling and fatal accidents per unit distance than automobiles. The Welland Canal was completed in 1833, bypassing Niagara Falls to connect Lakes Ontario and Erie. For a complete discussion of contemporary motorcyle types, see the main article: types of motorcycle. The canal opened up vast areas of New York to commerce and settlement, and enabled port cities such as Buffalo to grow and prosper. Motorcyles have been built in myriad different models for innumerable different purposes. Work commenced in 1817, and the Erie Canal was finished in 1825. Riders without a fuel gauge usually learn how many miles / km they can do with a full tank of fuel, and then use a trip meter if available to judge when they must refill the tank. Governor DeWitt Clinton strongly advocated building a canal to connect the Hudson River with Lake Erie, and thus all the Great Lakes.

There is not actually a separate reserve tank, the intake for the petcock has two pipes, one extending higher into the fuel tank than the other, when fuel no longer covers the long pipe the rider switches to the shorter pipe. Lawrence River could be navigated to Lake Ontario, the way westward to the other Great Lakes was blocked by Niagara Falls, and so the only route to western New York was over land. Fuel gauges are becoming more common, however traditionally a reserve tank arrangement has been used with a petcock on the side of the motorcycle allowing the rider to switch to a reserve fuel supply when the main fuel supply is exhausted; this is typically done while the vehicle is in motion. While the St. Almost all motorcycles have a speedometer, an odometer and a tachometer. The Hudson and Mohawk Rivers could be navigated only as far as Central New York. In any case, a canister of nitrous oxide is rapidly expended, and impractical for sustained use on a road-going bike by any sane rider. Transportation in western New York was difficult before canals were built in the early part of the nineteenth century.

Using methods like nitrous oxide are fine on dragstrips, but while not illegal, can be very dangerous on the street. Some purchases of Iroquois lands are the subject of numerous modern-day land claims by the individual nations of the six nations. It's very easy to blow the head gaskets or burn the valves of the engine with careless nitrous oxide injection. From 1786 through 1797 several groups of wealthy land speculators entered into agreements with one another, with neighboring states, and with the Indians to obtain title to vast tracts of land in western New York. Engines using large amounts of nitrous oxide need precise mixtures and/or configurable timing and carburation. Many of them were given land grants in gratitude for their service in the Revolution. The main benefits of nitrous oxide are three-fold —. Sullivan's men returned from the campaign to Pennsylvania and New England to tell of the enormous wealth of this new territory.

With great care, an engine can be helped to "sprint" by injecting small amounts of nitrous oxide (N2O). After the war, many moved to Canada. However, due to the special motorcycle dynamics, turbochargers are rarely used on production bikes. Hundreds died of exposure, hunger and disease. In addition, the compression ratio must be considered and adjusted accordingly, as an "overboosted" engine will destroy itself as well. Refugees fled to Fort Niagara, where they spent the following winter in hunger and misery. Engine internals such as pistons and connecting rods must be replaced with stronger ones for all but the smallest boost. The Sullivan Expedition moved northward through the Finger Lakes and Genesee Country, burning all the Iroquois communities, destroying their crops and their orchards.

On low boost settings, the turbocharger can increase power and fuel range. In 1779, Major General John Sullivan was sent to defeat the Iroquois. Since more air is being forced into the engine, the air/fuel ratio must be changed to prevent the engine from running lean [and potentially destroying itself]. During the war, four of the Iroquois nations fought on the side of the British. Turbochargers are generally more effective than superchargers because turbos spin using the exhaust gases while a supercharger uses engine power to spin it directly (usually via a belt system), robbing power. Massachusetts' charter had the same provision, causing territorial disputes between the colonies and with the Iroquois. One of the most effective ways of increasing power is forced induction. The colonial charter of New York granted unlimited westward expansion.

There is even a school of thought that louder systems are safer, as they attract the attention of (car) drivers, who might otherwise have failed to notice the motorcyclist. In colonial times, the Iroquois were prosperous, growing corn, vegetables and orchards, and keeping cows and hogs; fish and game were abundant. Most countries have limits on how much noise can legally be produced by vehicles, however this usually does not deter motorcyclists from fitting louder exhaust systems. The Iroquois had maintained the area between Seneca and Cayuga Lakes by annual burning as a grassland prairie, abounding in wild game including grazing American Bison herds. Aftermarket exhaust systems are usually louder, by varying degrees, than stock systems. The western part of New York had been settled by the six nations of the Iroquois Confederacy for at least 500 years before Europeans came. A "custom" tuned exhaust will often operate only at a narrower range of engine RPM, and therefore more suited to more specialised applications, usually racing (road or drag). That every male inhabitant of full age, who shall have personally resided within one of the counties of this State for six months immediately preceding the day of election, shall, at such election, be entitled to vote for representatives of the said county in assembly; if, during the time aforesaid, he shall have been a freeholder, possessing a freehold of the value of twenty pounds, within the said county, or have rented a tenement therein of the yearly value of forty shillings, and been rated and actually paid taxes to this State: Provided always, That every person who now is a freeman of the city of Albany, or who was made a freeman of the city of New York on or before the fourteenth day of October, in the year of our Lord one thousand seven hundred and seventy-five, and shall be actually and usually resident in the said cities, respectively, shall be entitled to vote for representatives in assembly within his said place of residence.

However many modern production bikes already have tuned exhausts. VII. This helps evacuate the exhaust from the engine more rapidly, and permits a longer power-stroke. On the subject of Disenfranchisement, Article VII of the new constitution had the following to say:. Another way to increase performance is to install a tuned exhaust system. This apportionment was to stand unchanged until a period of seven years from the end of the Revolution had expired, whereapon a census was held to correct the apportionment. Replacing stock shocks and fork springs as well as changing damping and valving rates will result in dramatic improvements in motorcycle stability and increased speed and rider confidence as a result. Under this constitution, the Assembly had a provision for a maximum of 70 Members, with the following apportionment:.

Suspension is typically the one element of the motorcycle that will receive the least amount of engineering attention from the factory. Slavery was legal in New York until 1827. More usable improvements can be had by improving and upgrading suspension components. This imbalance of power between the branches of state government kept the elite firmly in control, and disenfranchised most New Yorkers who would fight the Revolutionary War. Done correctly, this increases the velocity of the fuel / air mixture entering the cylinder, packing more mixture in per revolution. It retained provisions from the colonial charter such as the substantial property qualification for voting, and the ability of the governor to disband the elected legislature. Enlarging cylinder head ports, while common practice amongst many tuners, is often unnecessary (unless a big-bore kit has been fitted) to the extent that many engines benefit from decreasing the volume in the cylinder head. It called for a weak bicameral legislature and a strong executive.

Blueprinting, or meticulous restoration of an engine to (or beyond) factory tolerances can help to improve an engine's efficiency and restore power that would otherwise be lost. This constitution was a combination document, containing its Declaration of Independence from Great Britain, and its Constitutional Law. Improper attempts at tuning can yield benefits in one particular part of an engine's power band, while impairing performance everywhere else, provoking a net loss of power or handling. 892-898.). Engine modifications can yield appreciable performance improvements, but this is often costly and very time-consuming. Albany: Printed by Thurlow Weed, printer to the State 1642." pp. This is obvious, but often neglected. I.

On the engine, keep the air filter and drive chain (or drive belt) clean, use high-quality lubricants and fuel with precisely-tuned spark plugs, air / fuel mixture, and timing. (Verified from "Journals of the Provincial Congress, Provincial Convention Committee of Safety and Council of Safety of the State of New York, 1775, 1776 1777, vol. The right tires kept at the proper pressure will contribute to both speed and safety. It was drafted by John Jay. The next-most-common cause of loss of speed is one of the easiest to remedy: rolling resistance. It was not submitted to the people for ratification. Even experienced riders can benefit from top-level instructors helping to fine-tune their skills, as well as the opportunity to practice crash-avoidance techniques in a more controlled environment (and without risking one's own motorcycle). This constitution was framed by a convention which assembled at White Plains, New York on July 10, 1776, and after repeated adjournments and changes of location, terminated its labors at Kingston, New York on Sunday evening, April 20, 1777, when the constitution was adopted with but one dissenting vote.

By attending riding schools and increasing rider education levels, a motorcyclist will be able to ride more skillfully and, thus, more safely. The New York constitution was based on its colonial charter. The most efficient way to improve the handling and speed of a motorcycle is via increased operator skill. The original grants are in the New York state Library. The use of an approved helmet is required by law in many countries (or individual localities therein). The second grant was obtained by the Duke of York in July, 1674 to perfect his title. Wearing a t-shirt, shorts, and sandals on a motorcycle is not advised. In July 1673 a Dutch fleet recaptured New York and held it until it was restored to the English by the treaty of Westminster in February, 1674.

The motorcyclist must, therefore, consider proper motorcycle attire such as helmet ("full-face" providing the most protection), gloves, boots, and leather or synthetic protective clothing. This conquest was confirmed by the treaty of Credo, in July 1667. If a tire loses grip or goes flat, the rider may crash and make contact in a rather forceful (and very possibly a painful) manner with the road or other obstacles. The Duke of York had previously purchased in 1663 the grant of Long Island and other islands on the New England coast made in 1635 to the Marl of Stirling, and in 1664 he equipped an armed expedition which took possession of New Amsterdam which was thenceforth called New York. In most cases street riders will actually achieve higher levels of performance using street tires than race compounds. These grants embraced all the lands between the west bank of the Connecticut River and the east bank of (the) Delaware (say) sic. Race compounds are designed specifically for the short life and few heat cycles of a race environment, where street tires are designed for multiple heat cycles and use in a street environment. We accordingly hereby charge and command your Honors whenever you shall certainly discover any Clandestine Meetings, Conventicles or machinations against our States government or that of our country that you proceed against such malignants in proportion to their crimes.".

However, race compound tires should NOT be used in street applications. The directors of the West India Company resented this attempt to shake their rule, and wrote their director and council at New Amsterdam: "We have already connived as much as possible at the many impertinences of some restless spirits, in the hope that they might be shamed by our discreetness and benevolence, but, perceiving that all kindnesses do not avail, we must, therefore, have recourse to God to Nature and the Law. Motorcycle tires can also be found in "race compounds". In 1649 a convention of the settlers petitioned the "Lords States-General of the United Netherlands" to grant them "suitable burgher government," such as their High Mightinesses shall consider adapted to this province, and resembling somewhat the government of our Fatherland," with certain permanent privileges and exemptions, that they might pursue "the trade of our country, as well along the coast from Terra Nova to Cape Florida as to the West Indies and Europe, whenever our Lord God shall be pleased to permit.". Small cracks on the sidewall or bald spots on the tread are an indicators of the need to replace the tire. The government was vested in "The United New Netherland Company," chartered in 1616, and then in "The Dutch East India Company," chartered in 1621. Tires usually have an average life expectancy of about four to five years from date of manufacture; as mentioned above, mileage is also a factor, with many street tires having a service life between 3,000 and 10,000 miles. The Dutch, who began to establish trading-posts on the Hudson River in 1613, claimed jurisdiction over the territory between the Connecticut and the Delaware Rivers, which they called New Netherlands.

Tires should be maintained at the proper air pressure at all times; tire pressure is critical, the difference of a few PSI can have a dramatic impact on the handling and longevity of the tire. It was the 11th state to ratify the United States Constitution, on July 26, 1788. Some cruiser tires have raised white lettering on the sidewalls as a "retro" detail. New York was one of the original thirteen colonies that became the United States. Cruisers and "Sport Touring" tires try to find the best compromise between grip and durability. Counties were also ceded to Vermont before Vermont entered the Union in 1791. Touring tires are usually harder rubber and last longer but provide less grip (significantly less grip while cold, and the heavier rubber takes longer to warm up), while sport/performance tires provide amazing grip but may only last 1,000 miles (1,600 km) or less. Two of New York's eastern coastal counties, Cornwall and Dukes, later became parts of Massachusetts and Maine.

Dirtbike tires have knobby, deep treads for maximum grip on loose dirt, mud, or gravel — such tires tend to be less stable on paved surfaces. The territory of New York extended much farther than present-day New York State, having no official western boundary other than the Pacific Ocean. There are tires designed for dirtbikes, touring, sport and cruiser bikes. The colony, then called the Province of New York was divided into twelve counties, each of which was subdivided into towns. That is the small area that is in contact with the road surface while riding. On November 1, 1683, the government was reorganized. Motorcycles use pneumatic tires ('tyres' in the UK) which come in many configurations, the most important part of any being the contact patch. The English seized the colony in 1664, renaming it New York, after the Duke of York, the future King James II.

However, the additional gearsets are a source of power loss and add to bike weight. These settlers were claiming this land theirs, marginalizing the aboriginal inhabitants who had been living there since the Pleistocene epoch. This arrangement is superior in terms of noise, cleanliness, and is virtually maintenance free. The first settlers in the area now known as the State of New York were Dutch settlers in the colony known as New Amsterdam, beginning in 1613. Inside the bell housing a bevelled gear on the shaft mates with another on the wheel mount. . A shaft drive is completely enclosed, the visual cue is a tube extending from the rear of the transmission to a bell-housing on the rear wheel. New York's postal abbreviation is NY.

The belt is frequently toothed. Due to the preponderance of the population concentrated in the southern portion around New York City, the state is often regionalized into Upstate and Downstate. However, belt drives are limited in the amount of power they can transmit. It is sometimes called New York State when there is need to distinguish it from New York City, the most populous city in both the state and the nation. A belt drive is still subject to stretch, but operates very quietly, cleanly, and efficiently. New York is a state in the northeastern United States. Many manufacturers offer cruiser models with final drive options of a belt, or a shaft. Hillary Clinton (D).

Many motorcyclists replace the chain and both sprockets as a set to maintain efficiency and safety. For more information on this constitution, see: New York State Constitutions. Chains do deteriorate, and excessive wear on the front and rear sprockets can be dangerous. Gloucester County (Partitioned January 15, 1777 for the creation of the State of Vermont.), two. The lubricant is subject to being thrown off the fast-moving chain and results in grime and dirt buildup. Cumberland County (Partitioned January 15, 1777 for the creation of the State of Vermont.), three. Final drive from the gearbox to the rear wheel is typically accomplished with a chain, which requires both lubrication and adjustment for elongation (stretch) through wear. Charlotte County (Now Washington County.), four.

Advanced drivers can perform "full-throttle upshifts" on racing mounts, but this risks both the warranty and mechanical integrity. Tryon County (Now Montgomery County), six. Aided by beveled edges on the gears, shifting gears is simple for novices - no double clutching or grinding of gears. The county of Richmond, two. The two shafts are always geared together (except in neutral), always spinning at a speed nearly approximating the next higher or lower gear ratio. The county of Kings, two. Also, gear synchronizers typically found in passenger cars with manual transmissions are not necessary. The county of Orange, four.

The small mass of the whole arrangement allows for extremely quick gear changes. The county of Queens, four. Operating the shift lever slides individual gears on one shaft, to intersect with a matching gear on the other. The county of Suffolk, five. One shaft is geared to the final drive mechanism, and the other to the clutch. The county of Ulster, six. Internally, a rotating cam on the shift lever operates cogs on two counter-rotating shafts carrying a variety of gears. The county of Westchester, six.

From neutral, you may select either first or second gear, but higher gears may only be accessed in order - you may not shift from second gear to fourth gear, without shifting through third gear. The county of Dutchess, seven. The most commonly used transmission is a sequential gearbox. The city and county of Albany, ten. A lever on the handlebar, through a cable or hydraulic arrangement, uses mechanical advantage to release the clutch spring, allowing the engine to freewheel with respect to the transmission. For the city and county of New York, nine. Whether wet (rotating in engine oil) or dry, the plates are squeezed together by a spring, causing friction buildup between the plates until they rotate as a single unit, driving the transmission directly.

The clutch is typically an arrangement of plates stacked in alternating fashion, one geared on the inside to the engine, and next geared on the outside to the transmission input shaft. Only the largest touring motorcycles (most prominently, the Honda Goldwing) and a few models that are routinely used with a sidecar are fitted with a reverse gear. Modern motorcycles normally have five or six forward gears. In contrast, racing motorcycles have all gears arranged "below" the first gear, thus pressing the gear lever always shifts up, while lifting it shifts down.

Neutral sits between first gear and second, so a small lift out of first causes the gearbox to change into neutral, but a large movement causes the gearbox to change into second gear. Downshifting is done by pressing the gear lever. A normal street motorcycle is put in first gear by pressing the gear lever, while second and all further gears are reached by lifting it. The gear lever operates by shifting gears when it is pressed or lifted.

The transmission is controlled by a clutch lever under the left hand in standard configurations, a twistgrip throttle on the right handlebar and a gear lever at the left foot. Motorcycles have, over time, been powered by an extraordinary array of engines, from very early models powered by steam, to the ubiquitous gasoline engines of today. Note: This technique is not recommended for public road use. Racers while hard on the front brake will feather the rear brake just enough to start a controlled rear slide, thus rendering a sharper turn angle.

The technique of steering the motorcycle in a high speed turn (or lower speeds on a dirt course) using the rear brake is called "backing it in" (or "turning" on dirt). Another variation of brake use can be seen at top level motorcycle roadracing and motorcross events. Trailbraking is a term used to describe carrying the braking action of a vehicle past the turn entry, allowing the rider to adjust speed all the way through a turn to the apex. This is a highly skilled (and generally illegal) maneuver which requires practice to perfect.

The phenomenon known as a "stoppie" may only be achieved if the front brake is used aggressively with no application of the rear brake; if sufficient force is applied to the front brake, the rear of the motorcycle chassis will lift off the roadway, while the bike continues to move forward on the still-rotating front wheel. Another common misconception is that application of the rear brake will cause motorcycle instability. Riders fear that aggressive use of the front brake will stop rotation of the tire and cause loss of control, or a skid, and therefore often fail to use the front brake to its full potential. In virtually all cases, 70% to 90% of total braking force should be applied by the front brake when operated on a hard surface such as tarmac, with the remainder being simultaneously applied to the rear brake.

Some manufacturers have created Antilock braking systems (ABS). There are many brake performance enhancing aftermarket parts available for most motorcycles including brake pads of varying compounds and steel braided brake lines. Brakes can either be drum or disc based, with disc brakes being more common on large, modern or expensive motorcycles for their far superior stopping power, particularly in wet conditions. The front brake is generally much more powerful than the rear as roughly 2/3rds of stopping power can come from the front brake when properly applied and in some cases 100% depending on the model of motorcycle and operator; rear wheels can generally lock and skid much more easily than the front due to weight distribution dynamics.

However, several models have "linked brakes" which apply both at the same time, although one more than the other. In older motorcycles the rear may be on the left foot. There are generally two independent brakes on a motorcycle, one set on the front wheel, controlled by the right hand lever, and one on the rear controlled by the right foot. The rear suspension can consist of several shock arrangements:.

The rear suspension supports the swingarm, which is attached via the swingarm pivot bolt to the frame and holds the axle of the rear wheel. This is the speed at which the rider's feet can no longer be safely used to balance the bike. The rake should be chosen so that precessive force from countersteer and body steering slightly overbalance the leaning forces from the weight of the bike, at a speed near the running speed of a person. The angle of rake determines how controllable the steering is.

The front fork is the most critical part of a motorcycle. The front suspension generally consists of sliding steel tubes with long springs inside called forks which use hydraulic fluid for damping shock absorbers. Modern designs have the two wheels of a motorcycle connected to the chassis by a suspension arrangement, however 'chopper' style motorcycles often elect to forego rear suspension ("rigid frame"). Based on The control and stability analysis of two-wheeled road vehicles:.

There could be three kinds of stability problems with motorbikes:. Cabin cycle solved the problem of aerodynamics by isolating driver from outside air. However, these motorcycles still effectively push their way through the atmosphere with brute force. In the absence of a fairing or windshield, a phenomenon known as the windsock effect occurs at speeds above 100 km/h, where the rider becomes a major source of drag and is pushed back from the handlebars, tiring the rider.

Another problem is the fact that no designs have been discovered that can improve aerodynamic performance without unacceptably compromising the rider's ability to control the machine. As can be seen from the streamlined appearance of new performance motorcycles, there is much aerodynamic technology included in the design, but unfortunately no one has been able to overcome the effect from the turbulence caused by the spinning front wheel which disallows the motorcycle from cutting a clean path through the air. Drag is the major factor that limits motorcycle speed, as it increases at the square of the velocity, with the resultant required horsepower increasing with the cube of velocity. A plastic or fiberglass shell, known as a fairing, is placed over the frame in some models to shield the rider from the wind.

Performance racing motorcycles often use carbon-fiber wheels, but the expense of these wheels is prohibitively high for general usage. The wheel rims are usually steel (generally with steel spokes and an aluminium hub) or 'mag' type cast or machined aluminum. At least one motorcycle manufacturer (Buell) offer models that use a hollow frame as the fuel tank, and various manufacturers offer designs which use part of the frame as an oil reservoir. This tank is generally made of stamped, brazed or welded sheet metal, or blow molded high-density polyethylene.

The fuel tank is usually mounted above the engine. Some motorcycles include the engine as a load-bearing (or stressed) member; this has been used all through bike history but is now becoming more common. Carbon-fiber is used in a few very expensive custom frames. The chassis (or frame) of a motorcycle is typically made from welded aluminium or steel (or an alloy) struts, with the rear suspension being an integral component in the design.

Variations exist:. Recent years have also seen a resurgence in the popularity of many other brands, including BMW, Triumph and Ducati. Today, the Japanese manufacturers Honda, Kawasaki, Suzuki and Yamaha dominate the motorcycle industry, although Harley-Davidson still maintains a high degree of popularity in America. British manufacturers held a dominant position in some markets until the rise of the Japanese manufacturers (led by Honda) in the late 1960s and early 1970s who were able to produce designs faster, cheaper and of better quality.

The German NSU was the largest manufacturer from 1955 until the 1970s when Honda became the most prominent manufacturer, a title it retains to this day. After the Second World War, in 1951, the BSA Group became the largest producer of motorcycles in the world. After that, this honour went to Harley Davidson, until 1928 when DKW took over as the largest manufacturer. Up until the First World War, the largest motorcycle manufacturer was Indian.

As the engines became more powerful and designs outgrew the bicycle origins, the number of motorcycle producers reduced. In the early period of motorcycle history there were many manufacturers as producers of bicycles adapted their designs for the new internal combustion engine. In 1894, the Hildebrand & Wolfmüller was the first motorcycle that was available for purchase. This machine predates the invention of the safety bicycle by many years, so its chassis is also based on the "bone-crusher" bike.

It's powered by a charcoal-fired two-cylinder engine, whose connecting rods directly drive a crank on the rear wheel. There is an existing example of a Roper machine, dated 1869. One such machine was demonstrated at fairs and circuses in the eastern US in 1867, built by one Sylvester Howard Roper of Roxbury, Massachusetts. However,if one counts two wheels with steam propulsion as being a motorcycle, then the first one may have been American.

They had not set out to create a vehicle form but to build a simple carriage for the engine which was the focus of their endeavours. It was the first petroleum-powered vehicle ever and, but for the provision of a pair of stabilizing wheels, a motorized bicycle, although they called their invention the Reitwagen ("riding car"). The inspiration for the earliest motorcycles, and arguably the first motorcycle, was designed and built by the German inventors Gottlieb Daimler and Wilhelm Maybach in Bad Cannstatt (a city district of Stuttgart) in 1885. .

The rider sits astride the vehicle on a seat, with hands on a set of handlebars which are used to steer the motorcycle, in conjunction with the rider shifting his weight through his feet, which are supported on a set of footpegs which stick out from the frame. The wheels are in-line, and at higher speed the motorcycle remains upright and stable by virtue of gyroscopic forces; at lower speeds continual readjustment of the steering by the rider gives stability. A motorcycle is a two-wheeled vehicle powered by an engine. Parry Sound Sportbike Rally.

Sturgis Motorcycle Rally [5]. Port Dover Friday the 13th [4]. Laconia Motorcycle Week [3]. Daytona Bike Week [2].

Minibikes or Pocket-Bikes as used in Pocketbike racing. Adventure Touring (dual-sport bikes) Ontario Dual Sport Club. Extreme Distance Events (competitive long distance riding, including Iron Butt events). Touring and Motorcycle camping (touring and dual-sport bikes).

Cruising (cruisers, or motorcycles that resemble Harley-Davidson models). Street Racing (sport bikes). Classic Racing (Racing bikes from an earlier era). Track Racing (sport bikes).

The Single Overhead Cam Owners Club dedicated to SOHC4 Hondas. East Coast Bikers Forum. FJRForum. Katriders.

[1]. V4HondaBBS. Suzuki Intruder-Boulevard Owners Club. Honda Owners Club.

Riders of Kawasaki (RoK). Harley Owners Group (HOG). Yamaha Owners Club. Boss Hoss Riders Association.

This colder mixture helps to keep the engine running cooler, which is very useful as nitrous oxide is almost exclusively used in stressful, high RPM situations, primarily drag racing. This chilling effect raises the density of the mixture, packing more fuel and oxygen into the combustion chamber. As nitrous oxide is stored in liquid form, it is still very cold when it evaporates and is mixed with fuel. More oxygen is introduced into an engine's combustion chamber.

'Softail' style monoshock, which is mounted horizontally in front of the swingarm, below the swingarm pivot bolt. traditional monoshock, which is placed at the front of the swingarm, above the swingarm pivot bolt. dual shocks, which are placed at the far ends of the swingarm. Rear load assemblies with appropriate stiffness and damping were successful in damping out weave and wobble oscillations.

Degraded damping of the rear suspension, rear loading and increased speed amplifies cornering weave tendencies. Amongst others, stiff frames, a long wheelbase, a long trail and a flat steering head angle were found to increase weave mode damping. The largest contribution to the weave damping came from the cornering and camber stiffnesses and relaxation length of the rear tyre and not so much from the same parameters of the front tyre. Lateral distortion should be opposed as much as possible by locating the front fork torsional axis as low as possible.

Common levels of lateral stiffness at the wheel spindle deteriorates the wobble mode damping substantially with significant changes in the wobble frequency as well, and slight reduction in the weave mode damping at high speeds. From a stability point of view it is desirable to make the lateral stiffness as large as possible, with the possibility of an optimum value for the torsional stiffness of the rear frame. Tyre (tire) characteristics and inflation pressures are important variables in the behaviour of the motorcycle at high speeds. The weave oscillations damp out once the rider reduced the roll angle.

It can become unstable at higher speeds with fatal results. Weaving (AVI movie) is a low frequency (2-3 Hz) oscillation of the whole vehicle. It can appear at moderate speeds. It is often relatively harmless but annoying (and quite frightening if previously inexperienced).

Wobbling (AVI movie) is a high frequency (7-9 Hz) oscillation of the front wheel. Capsizing is well known in low speeds, and easy to overcome by the rider using their feet support themselves. However, a proper motorcycle has fewer than four wheels in contact with the ground. (Early models had a single front wheel, but these were prone to rollovers.) ATVs are used off-road for utility and recreation.

These have two or more back wheels, usually two front wheels, an open driver's seat and a motorcycle-type handlebar. Motorcycle manufacturers often also produce All-terrain vehicles or ATVs. There are other 3-wheeled variations, commonly referred to as a trike or motortricycle. Some motorcycles can be fitted with a sidecar, this converting it into a 3-wheeler or "hack".

Some motorcycles have floorboards instead of footpegs. There are three basic forms of motorcycles: offroad, street and dual-purpose.