Brand new clutch assembly with accessories Fit most 110cc, 125cc, 135cc ATVs, dirt bikes, and go karts with semi automatic with reverse engine 18 Teeth Drive Gear Includes everything you need to replace the old clutch. Please check pictures and specifications for compatibility, some models use 17 teeth clutch. This is a brand new clutch assembly with accessoriesFit Models: most 110cc, 125cc, 135cc ATVs, dirt bikes, and go karts with semi automatic with reverse engine almost all of the Chines made ATVs, such as TaoTao, Buyang, Coolsports, Kazuma, Sunl, Roketa, AIM-EX etc. Specifications: 18 Teeth Drive Gear Semi automatic clutch Inside Diameter: 17mm Outside Diameter: 116mm Please check pictures and specifications for compatibility, some models use 17 teeth clutch.