100CC BICYCLE ENGINE KIT: The four stroke engine offers a robust three.5HP horsepower, a displacement of 100cc, a rated power of 2kw/h, along with a max rotating speed of 3600RPM, which provides you with powerful power and accelerates your bike to a max speed of 50km/h. Side look at mirror: https://gregoryqvwyy.popup-blog.com/34121003/a-review-of-bike-engines-explained