Complete assembled engine Type: Single cylinder, 2-stroke, air-cooled, 49cc 14 teeth T8F sprocket with 3rd bearing support Max output/Rotation(kw/rpm): 1.82/7000 Suitable for most 47cc 49cc 50cc pocket bikes, gas scooters, mini choppers Specifications:Engine Type: 1-cylinder,air-cooled, 2-stroke Displacement: 49cc Chain Size: T8FMax output/Rotation(kw/rpm): 1.82/7000 Bore x stroke: 44x34mm Fuel: petrol and engine oil mixture(proportion 25:1) Ignition: C.D.I Lubrication: mixed fuel oil Carburetor: Diaphragm type Fuel tank capacity: 1.2L Starter: recoil Air filter: Common This engine is designed with a bigger bore kit with more performance for racing!Suitable for most 47cc49cc 50cc pocket bikes