4 stroke bicycle engine mode:142fa. Engine type:single cylinder, air-cooled, 4stroke Borestoke:4238 Displacement(cc):49cc Max.Powe(kw/rpm):1.2/6500 Type of ignition:magnetos non-contact induction power storage Start mode:hand-operated Net weight(kg):13kg Dimensions(mm):240240250 20' fcl:850 kits 40'fcl:2000 kits.