Such a engine has only one cylinder and functions best on compact cc bikes. It's cheap to keep up and repair if a little something goes wrong. It also creates high torque at small revs, that makes it well suited for off-highway and commuter bikes. Illustration: Splendor, Platina and in https://collinswwxy.sharebyblog.com/34894486/new-step-by-step-map-for-bike-engine-kit