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 39mmItinerary41.4mmActual Displacement 49.5mlCompression ... oil bath gear Transmission TypeRegular meshing gear 50cc, 4-stroke, electric/kick start, cheap motorcycle engine