4 Stroke 15HP 420cc Gas Black, Horizontal Shaft OHV Gas Motor, Recoil Start Go Kart Motor 19782606Specification Type: Single Cylinder, 4 stroke Color: Black Material: Aluminium, Iron Surface Treatment: Shot Blasting, Color Galvanizing, and Plastic Spraying Power Source: Gasoline Engine Cooling Type: Air Cooling Maximum Torque: 28N. m Bore Stroke: 90*68mm 3. 54*2. 68inch Crankshaft Diameter: 25mm 0. 98inch Crankshaft Length: 100. 5mm 3. 98inch Displacement: 420cc Horsepower: 15hp Rated Power: 9600W Maximum Power: 11000W Rotational Speed: 3600rpm