Description:

1. Bolt Hole Spacing: 70mm (2 3/4"). 2. 10 Splines, 12 Voltage. 3. Total Diameter of Shaft: 7.25mm. 4. For 50cc 4-stroke QMB139 engines. 5. Fits most of Gy6 50cc engine: 49CC 50cc 60cc 72cc Scooters, Mopeds, ATVs, Go Carts with 139QMB GY6 Engine..