When you want replacement parts for your 4-stroke bicycle engine kit, BikeBerry’s got exactly what you need to repair and tune your motor. From the engine to the transmission and beyond, we offer parts compatible with Flying Horse, BBR Tuning, HuaSheng, and Monster 4-stroke bicycle engines. Standard drive or friction drive, 38cc to 79cc, when you need 4-stroke bike engine parts head over to BikeBerry.com and get your motorized bike back on the road in no time.