Features: Rugged metal engine body for extra durability Super fuel efficient, consumes only 3 liters of fuel per 100 km Can reach speeds up to 50 km/h Suitable for most types of 26″ and 28″ bicycles, such as mountain bikes, road bikes, cruisers, choppers Specifications: Engine mode: Single-cylinder, air-cooled, 2-stroke Cylinder bore and stroke: 49 mm and 40.2 mm Rated power: 3 kW / 5000 rpm (4 horsepower / 5000 rpm) Maximum power: 3.8 kW / 6000 rpm (2.85 horsepower / 6000 rpm) Ignition mode: CDI Compression ratio: 6:01 Gear ratio: 18:01 Fuel type: No. 90 Speed limit: 50 km/h Lubricating oil: 2-stroke gasoline engine (or oil for 10W/40,10W/30) Fuel and engine oil mixing ratio: 16:1 for new kits, 20:1 after 500km Spark plug type: Z4C 14MM Oil consumption capacity: 3L/100km Clutch type: Friction disc / Dry cooling Mode: Natural air cooling Kit includes: 1x 100cc engine only