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 Auto Clutch for 50cc 70 cc 90cc 110 cc 125cc ATVs Dirt Bikes Go Karts Quad 4 Wheeler Pit Bike Dune Buggy Taotao SunL JCL Supermach Tank Kinroad BV Powersports DongFang Condition: 100% Brand New and Top Quality. 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 Please identify X-Pro. Great Price. Fast Shipping. Good Service. Why our customers choose X-Pro: 1. Fast Delivery Unlike many online retailers, we carry all our own stock and ship everything from our U.S. warehouse. 2. Know you’re getting the right parts. Because we handle all of our own stock, we are able to offer you the clearest photos and most up to date specs on all of our products. While many of our competitors’ products offer grainy and out of date spec sheets, our meas