Easy installation- 43cc 2 stroke bike Gas Motorized Engine kit is by far the easiest to install. It does not require disassembly of bicycle parts.It is easy to use, has first-class performance and is compatible with the advantages of ordinary bicycles. It can be used for different sizes of bike, and it is light, flexible and comfortable. Low noise, dual-purpose pedal power, high safety and reliability. Complete kit make more fun to DIY a perfect Motorized Bike for yourself. Condition: 100% Brand New and High Quality. Bicycle Rear Friction Gasoline Engine For 43cc 2Stroke Bike Gas Motorized Engine. Forced air cooling, single-cylinder, 2-stroke, hand-started gasoline engine. Bore 40 mm, Displacement 43CC Power 1.1 kW. Fuel tank volume 0.9L Ignition method CDI electronic point Starting method: hand-pull start Clutch mode: dry automatic clutch Bike speed 40 km/h Fuel consumption is 100 kilometers / 2 liters. Please check part photos, part number (OE# of your old part), part description and compatibility ch art above carefully and compare them with your old part to make sure it is what you need. We will do everything we can to give you a satisfying solution. We do our best to resolve any issue. So please talk with us and we will not let you down. FEEDBACK IS VERY IMPORTANT TO US.