The YZF-R6 was introduced in 1999 as the super sport version of YZF-R1 super bike, and as a companion to the more street-oriented YZF600R sport bike which continued to be sold alongside the R6. The motorcycle featured Yamaha's completely new engine design capable of producing over 108 hp (81 kW) while stationary. The R6 was the world's first 600cc production four-stroke motorcycle producing over 100 hp (75 kW) in stock form.[6]

2006 YZF-R6The YZF-R6 has been revised several times since its introduction. Starting with the 2003 model, when the R6 became fuel-injected. The 2006 model year was a significant upgrade with a new engine management system featuring the YCC-T ride by wire throttle and a multi-plate slipper clutch.[7] The 2008 model incorporated the YCC-I variable-length intake system to optimize power at high engine rpm and an improved Deltabox frame design.[8]