Fits on many models of 50cc Gy6 Scooters, Go-Karts, Atvs, & BuggiesFits on Chinese models such as: YERFDOG, SUNL, SYM, PGO, KYMCO, VENTO, TGBThis Clutch can also fits on brands like: Yahama, Bombardie, Kawasaki, Polaris, and SuzukiKymco:Filly 50cc,Agility 50cc,Super 8 (4 stroke,50cc,AC)People 50 ,4 Stroke-ACTaishan:Sport 50cc,Commuter 50ccBaotian:50QT-9,50QT-11Sinski:XSJ50QT-B,XSJ50QT-6Dotera:50QT-11Jalon:JL50QT-18andother Chinese GY6 base 50cc engineATV & GY6 50cc base 4 -stroke engine and most China made 50 cc 4 stroke engine 139QMB and 139QMA 50QT & 49QTCheck your engine numberyour engine serial number near engine mountwill stamp 139QMBxxxxxxx or 139QMAxxxxxxx