[Parameters]Engine displacement: 49cc, cylinder number: single cylinder, stroke: 2-stroke, chain: T8F, sprocket: 14 teeth, gas oil mixing ratio: 25:1 (gasoline: two-stroke engine oil), gearbox deceleration rate: 3.1:1, displacement: 49cc, spark plug size: L7T L7TC.[High Performance]49CC two-stroke engine is equipped with high-performance cylinder head, plug, powder coated metal pulling device, air filter and 14mm carburetor, balance crank, balance flywheel, perforated piston window, upshift gear transmission device.[Widely Used]49cc small motor air-cooled racing engine, which can achieve a speed of 40mph according to the user’s weight and terrain. It is widely applicable to 49CC 2-stroke mini bike, mini cross-country bike, ATV or scooter.[Package Includes]1 * 49cc engine, 1 * fuel tank, 1 * accelerator cable, 1 * harness, 1 * handle, 1 * chain.[Note]Instructions are not included, and it is strongly recommended that professional personnel install. Be sure to use professional two-stroke