Ultralite Rear Sprocket 42T for Street YAMAHA YZF-R1/M 520 Conversion 2015-2017

Ultralite Rear Sprocket 42T

Manufactured to extremely tight tolerances. 7075 T6 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 a very high-strength base material and an exceptionally hard-wearing surface result in significantly increased chainwheel life. Hard anodized finish for better wear resistance. 520 conversions available for certain models