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The Rear Sprockets are made from 7075-T6 billet aluminum CNC-machined for maximum fit accuracy. The rear sprockets features a radial mud groove etched just inside the sprocket teeth to shed mud and grit which saves weight and increases chain life. Sprocket sizes other than stock are for closed-course competition only on ’06 and later off-road models and all street legal models. Changing the final drive ratio affects exhaust emissions and also affects speedometer readings.YZ models are for closed-course competition use regardless of modification.

YZ85/YZ85LW Rear Sprocket