Ultralight Rear Sprocket Renthal Front Sprocket: Precision CNC-machined to extremely tight tolerances for strength and light weight. Features specially developed nickel-chrome-molybdenum steel, case-hardened core refined for strength and hardness. Certain models are available in the ultralight design. Rear Ultralight Sprockets: Manufactured to extremely tight tolerances from a special material developed to withstand the stress of Supercross, Motocross and Enduro. 7075 T-6 aluminum alloy rear chainwheels are 66% lighter than steel, yet incredibly durable. Advanced tooth profile, concentricity and accuracy of fit provide maximum power transfer and long-life. Combination of high-strength base material and hardwearing surface result in significantly increased chainwheel life. Self-cleaning mud grooves help prevent dirt build-up.
_________________________________________________________________________________________________________________________________________________ FITMENT CHART

1990	Yamaha	Blaster 200
1992	Yamaha	Blaster 200
1993	Yamaha	Blaster 200
1994	Yamaha	Blaster 200
1995	Yamaha	Blaster 200
1997	Yamaha	Blaster 200
1999	Yamaha	Blaster 200
2003	Yamaha	Blaster 200
2005	Yamaha	Blaster 200
2006	Yamaha	Blaster 200
2005	Yamaha	Raptor 350
2007	Yamaha	Raptor 350
2008	Yamaha	Raptor 350
2013	Yamaha	Raptor 350
1990	Yamaha	Warrior 350
1993	Yamaha	Warrior 350
1995	Yamaha	Warrior 350
1996	Yamaha	Warrior 350
1997	Yamaha	Warrior 350
1999	Yamaha	Warrior 350