This has a 1" x 3-5/32" shaft, 9 Amp Alternator, Fuel Pump, and Electric Start. If you have an Electric Clutch you will need to buy an engine with a 9 amp or larger charging system. If you purchase and engine with a 5/3 amp charging system, you would need to reuse the stator and regulator from your original engine. If your fuel tank is under the seat you will need to buy an engine that comes with a fuel pump.