New unused 80cc two-stroke engine designed for bicycles Power 3 horsepower 80cc single cylinder two-stroke air-cooled Tank capacity approximately 2 liters Fuel type 91 mixed with oil Mixing ratio 1 liter gasoline with 60 ml oil for the first engine run-in, after 500 km reduce the oil ratio to 1 liter gasoline with 50 ml oil It is very important to mix oil with gasoline so it doesn't get damaged Speed from 35 to 45 kilometers per hour Very easy installation, there is a tutorial on YouTube It comes with a user manual It fits on worker bicycles and mountain bikes There are pictures of the bicycles it fits on Price is non-negotiable, only serious buyers. The price is 550.