... 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 ... typeMulti-chip oil bath gear Transmission TypeRegular meshing gear 50cc, 4-stroke, electric/kick start, cheap motorcycle engine