Specifications: 49cc single cylinder, air-cooled, 2-stroke Fuel: 25:1 gasoline / engine oil mix Piston Diameter:44MM Top Mounting Brackets: 11cm Bottom Mounting Brackets: 10.3cm Top Through Hole Diameter M. 0.161 Bottom Through Hole Diameter M. 0.245" Exhaust Diameter: 0.589" Connector: 2 Pin White Cord: 75cm Length: 26cm Width: 23cm Height: 20cm Clutch Mounting Hole Distance: 7.3cm Clutch Mounting Hole Diameter: 0.289" Clutch Pad: 2 Shoe Carburetor Hole Diameter: 0.213" Pull Start Mounting Hole Distance: 7.3cm Weight: 4.5KG Fit: Majority of gas scooters, pocket bikes, and mini choppers MINI QUAD / ATV Brand New 2 Stroke Pull start engine single cylinder, air cool Suits Chinese petrol scooters and choppers Might also fit for some pocket bikes, quad bikes and.