The Yamaha YZF-R6 was introduced in 1999 as the super sport version of Yamaha YZF-R1 super bike, and as a companion to the more street-oriented YZF600R sport bike which continued to be sold alongside the Yamaha R6. The YZF-R6 was the world's first 600cc production four-stroke motorcycle producing over 100hp in stock form.The YZF-R6 has been revised several times since its introduction. Starting with the 2003 model, when the R6 became fuel-injected. PP Tuning performance parts for Yamaha YZF-R6 (2003–2004), rearsets, adjustable brake and clutch levers, clip-on handlebars, protectors etc. are produced from highly resistant materials. This ensures their longevity.