Renthal Ultralight Rear Sprockets Yamaha 125-450cc gutscustomseat Big bore kit for the

Big bore kit for the 2003-2005 CRF150F

Make sure there is no valve on the rim

(2001-Current) YZ250F

Used exclusively by the official Yamaha factory off-road race teams

Accepts oversize sprockets without any problem including wide rivet styles

Renthal Ultralight Rear Sprockets Yamaha 125-450cc gutscustomseat Big bore kit for theRear Ultralight Sprockets:. Manufactured to extremely tight tolerances from a special material developed to withstand the stress of Supercross, Motocross and Enduro. 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