Fits all 4-stroke engines 50-125cc ATVs, dirtbikes and Go Karts with “Over the Engine Upper” mounted starters. 12V system. Sold with wire. If starter is mounted below engine, use #70-0072. SPECS: 12T sprocket, Bolt hole spacing: 78.5mm and 70mm. Length end to end: 5.75”. Sold as complete assembly, may look different if the customer only brings the casing when seeking parts. If it’s over the engine, it’s this part.