100CC BICYCLE ENGINE KIT: The four stroke engine boasts a robust 3.5HP horsepower, a displacement of 100cc, a rated power of 2kw/h, in addition to a max rotating speed of 3600RPM, which delivers you with sturdy power and accelerates your bike to some max speed of 50km/h.Hanger: part of frame or an attachment to your frame to which the derailleur is