Yamaha has developed a line of performance sprockets made specifically for the Marchesini H-Spoke and T-Spoke Wheels. Sprockets are made from 7075-T6 billet aluminum and CNC-machined for maximum fit accuracy.
Sprocket sizes other than stock are for closed-course competition only. Changing the final drive ratio affects exhaust emissions and also affects speedometer readings.
Fits '98~'13 R1, '99~'13 R6