Also, front end lighting was improved in 2002, between the higher definition headlights and also side 'parking' lights within the twin-headlight panel, giving a more angular appearance. This allowed for very clean rear body lines when choosing one of several common after market modifications, such as removal of the turn signal stalks and stock license plate bracket and replacing them with assorted available replacements that 'hug' the body or frame. The rear end of the motorcycle was updated and streamlined with a LED taillight. The exhaust system was changed from a 4-into-1 to a new titanium 4-into-2-into-1 design. The cooling system was redesigned for better performance and compactness. These changes improved the frame's rigidity by 30%. Also in 2002, Yamaha released the newly developed Deltabox frame, which, with its hydro formed construction, reduced the total number of frame welds. One notable improvement was the use of new cylinder sleeves of a high silicon content alloy containing magnesium that minimized heat induced distortion, reducing oil consumption. With a similar power output to the 2000-2001 bike, the engine remained largely the same. The Yamaha YZF-R6 was introduced in 1999 as the 600 cc version of the R1 super bike.Ī new fuel injection system was introduced for the 2002 year, which worked like a carburetor by employing a CV carburetor slide controlled by vacuum created by the engine. This created a high powered and high torque engine. The exhaust system utilized an EXUP valve, which controlled the exhaust gas flow to maximize engine power production at all revs. The instrument panel was electrical with a self diagnosis system and digital speed readout. USD 41mm front forks supplied by KYB mounted 300mm semi-floating disk brakes. Four 40mm Keihin CV carburetors fed fuel to the engine 140 bhp was claimed by the factory. The swingarm was able to be made longer without compromising the overall wheelbase, which was a short 1385mm. This, in turn, allowed the frame design to place the weight of the engine in the frame to aid handling because of an optimized center of gravity. This 'compacting' of the engine made the total engine length much shorter overall, thereby, allowing the wheelbase of the motorcycle to be shortened significantly. This design feature was revolutionary, called a 'stacked gearbox', it has set a precedent for other manufacturers to follow. Yamaha launched the YZF-R1 after redesigning the Genesis engine to create a more compact engine by raising the gearbox input shaft and allowing the gearbox output shaft to be placed beneath it.
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