2012 YAMAHA Yzf-R6, Light, powerful, and bristling with knowledge gained from years of racing, the YZF-R6 is the most advanced production 600cc motorcycle Yamaha or anybody else has ever built. The YZF-R6 was the first production motorcycle with YCC-T , Yamaha Chip Controlled Throttle system for flawless response under all conditions. YCC-I , Yamaha Chip Controlled Intake, is used on the R6 to vary intake tract length for excellent cylinder filling and a broader powerband. Back torque-limiting slipper-type clutch greatly facilitates braking/downshifting from high speed. Close-ratio 6-speed transmission delivers seamless power and maximum acceleration.