Auto Clutch for 50cc 70 cc 90CC 110 cc 125cc ATVs Dirt Bikes Go Karts Quad 4 Wheeler Pit Bike Dune Buggy Taotao SunL Coolster Kandi Tank SSR Roketa Baja Auto Clutch. Top Quality Guaranteed. It fits most Chinese 50cc-125cc Dirt Bikes, Go Karts, ATVs 17 tooth Inside Diameter: 17mm; Outside Diameter: 116mm; ; Bolt hole spacing: 42 x 60mm