RAD60033129017 428-17mm-17t Engine Chain Sprocket. This part may also fit on 50-125cc Dirt Bike, Go-Karts and ATVs with 428 chain. This part fits almost all brands of ATV from China. Such as Taotao, Buyang, Coolsport, Kazuma, Sunl, Roketa, AIM-EX, etc.