Motorcycle stunt riding, sometimes referred to as simply stuntriding, is a motorcycle sport characterized by stunts involving acrobatic maneuvering of the motorcycle and sometimes the rider. Common maneuvers in stunt riding include wheelies, stoppies, and burnouts. Sport bikes have become a common vehicle for stunts.
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Supermoto or Supermotard is motorcycle racing on a circuit that alternates between three types of track: flat track, motocross and road racing, using motorcycles designed for that purpose. Supermoto was originally conceived as something like an all-star game, in which the best riders from the three separate genres of motorcycle racing could temporarily leave their normal race class to come together and compete for the title of best all around racer. Today supermoto is a distinct genre of its own and riders in the other classes do not routinely cross over into supermoto.
Tomos sm125 Supermoto
Prior to the 1990s, supermoto bikes, including the precursor motorcycles used in Superbikers, were converted open-class two-stroke motocross or enduro bikes desired for their light weight and jumping abilities. The motorcycles currently used for Supermoto racing are predominantly single-cylinder four-stroke powered dirtbikes with 17-inch (430 mm), sometimes with 16.5-inch (420 mm) front wheels. The 17-inch (430 mm) wheels allow the use of up to 7.0-inch-wide (180 mm) superbike road racing slick tires. These are often hand-grooved on the rear tire to facilitate slightly better acceleration on the dirt stretches of a supermoto course. Suspension is lowered and slightly stiffened in comparison with a stock dirt bike, and braking power is improved with oversize front brake rotors and calipers. Despite the lack of trees on supermoto courses, 'bark busters' (hand guards) are frequently added to supermoto bikes due the extreme cornering angles achieved by riders. Hand guards also greatly improve survivability of the brake & clutch levers during a fall making supermoto bikes highly crash resistant and often able to quickly re-enter the fray during a race following a crash.
In 1991, Italian manufacturer Gilera released the 'Nordwest' model, the first factory produced supermoto. Other European manufactures quickly followed suit, among them KTM, Husqvarna, Husaberg and CCM; all manufacturers whose emphasis were off-road models at the time. Models were developed for both track and road use. It took another ten years, until the mid-2000s for Japanese manufacturers, such asYamaha (2004), Honda (2005) and Suzuki (2005) to start introducing supermoto models in the European market. Most of the supermoto bikes sold to the public are more domesticated models for road use rather than outright racing, for example the Suzuki DR-Z400SM.
Due to the popularity, versatility, excitement and durability of these motorcycles, some owners modify them for street use. In order to do this, headlights, tail lights, horn, mirrors and street-legal tires among other occasional modifications are needed. Some state motor vehicle departments take a dim view of turning off-road bikes into street legal bikes, such as California which requires an on-road emissions designation from the manufacturer. In Europe most Supermotos are sold street legal from the factory and later tuned for race use. Supermoto type bikes make excellent city-goers as their upright seating position provides great visibility in traffic. Their narrow frames and light weight also make them incredibly maneuverable, as well as easier to ride in twisty or less than ideal road conditions that force mostsportbike riders to slow down.
