| Detailed Product DescriptionNew Product:2 Models: * Motorized bicycle rear axel hub assembly with 2 heavy duty dual bearings with dual row balls. * Model USA #1 with sprocket attach flange having built in freewheel for rope pull engine starting and centrifugal clutch operation. * Model USA #2 with solid sprocket attach flange for bicycle pedal engine starting. * Comes with HD drum brake and control cable; * Choice of 56T,50T,48T or 44 tooth chain sprocket. * Min order 200 fob: Shanghai without engine order. * No min. With Skyhawk WS 4 cycle 49cc bike engine order. See advertized seperately on Alibaba. | 
