... :250CC Dirt bike Engine 200cc,Motorcycle engine,4-stroke,vertical,water-cooled Displacement:249.4ml ------------------------------------------------------------------ Model:LC170MM-2Type:single cylinder,4 ... fins are used to improve heat dissipation. The 6-set clutch and modified friction plates are used and the optimization ... Engine ,Motorcycle engine,Loncin Engine,single cylinder,4-stroke,water cooled