Yamaha YZF R1 & R6

The Yamaha YZF-R6 was introduced in 1999 as the super sport version of Yamaha's Yamaha YZF-R1 super bike, and as a companion to the more street-oriented Yamaha YZF600R sport bike which continued to be sold alongside the R6.
 

The YZF-R6 has been revised several times since its introduction. Starting with the 2003 model, 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. The 2008 model incorporated the YCC-I variable-length intake system to optimize power at high engine rpm and an improved Deltabox frame design.