1,50cc motorcycle engine 2,4-stroke 3,electric/kick start 4,air ... cooled 5,good quality with cheap price XF 50cc motorbike engine detailsDisplacement50mlModel1P39FMB Type1-cylinder, 4-stroke, air-cooled Cylinder Size ... /r/minMaximum Torque4.1(4500)N.m/r/minMinimum Fuel consumption450g/kw.hIdling1600±150r/minIgnitionC.D.I Valve modeOverhead ... 50cc, 4-stroke, electric/kick start, cheap motorcycle engine