Clutch Bell Outer Diameter:135mm/5.31″,Torque Driver Pulley Diameter:140mm/5.51″,Clutch Bell Spline number:19 teeth(as the picture shows) For proper manitenance you should add 2 drops of pil to the bushing each time before riding Before buying,please check the size and model.Avoid buying wrong parts Warranty:We are always available to help our customers.If you are not satisfied with the order,please leave us a message.Please have a good time shopping experience,We are committed to providing the best service pls confirm The size of the product meets your requirements before you purchase Note:please allow 0.5-1 inch difference due to manual measurement.1inch=2.54cm Replacement for: Kymco Agility125 150 4 stroke Taotao 125 150 4 stroke Tank 150 BMS 150 Baja SC125 SC150 Jonway 150 Shenke 150 Yerfdog GX150 Spiderbox 150cc Coolster 3150DX2 Helix 150 and all 4 stroke GY6 125cc 150cc engine Package Included: Rear Clutch Set x 1pc GOOFIT Keychain x 1pc About After-sales service: Fir