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

2009	Yamaha	YFZ450
2012	Yamaha	YFZ450
2013	Yamaha	YFZ450
2009	Yamaha	YFZ450R
2010	Yamaha	YFZ450R
2011	Yamaha	YFZ450R
2007	Yamaha	Grizzly 450
2008	Yamaha	Grizzly 450
2009	Yamaha	Raptor 250
2013	Yamaha	Raptor 250
2006	Yamaha	Raptor 700
2007	Yamaha	Raptor 700
2008	Yamaha	Raptor 700
2014	Yamaha	Raptor 700
2013	Yamaha	Raptor 700R
2009	Yamaha	YFZ450RSE
2010	Yamaha	YFZ450RSE
2011	Yamaha	YFZ450RSE
2007	Yamaha	YFZ450V
2008	Yamaha	YFZ450SP