Features: Durable metal engine body for extra durability Super fuel efficient, consumes only 2.5 liters of fuel per 100 km Can reach speeds up to 38 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: 47 mm and 40 mm Rated power: 2.5 kW / 5000 rpm (3 horsepower / 5000 rpm) Maximum power: 3.5 kW / 6000 rpm (5-6 horsepower / 6000 rpm) Ignition mode: CDI Chain model: 415 Chain length: 110 links Compression ratio: 6:01 Gear ratio: 18:01 Fuel type: No. 90 Tank capacity: 2 L Limit speed: 38 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 sets, 20:1 after 500 km running Spark plug type: Z4C 14MM Oil consumption capacity: 2.5L/100km Clutch type: Friction disc / Dry cooling Mode: Natural air cooling Package includes: 1x 80cc engine only