2 pulley Combo original 4G Transmission with included 80T & 100T pulleys

With a 4G Tranny Combo you get the best of both worlds when using a 49cc or 53cc Huasheng 4 stroke engine.   1A pulley for SPEED and 1B pulley for HILL CLIMBING. (1) T-Belt 4G transmission and spanner wrench plus > 2 driven pulleys, (2) T-belts and one each of 9T & 10T chain sprockets. For Flat land speed use the 80T pulley with included belt and a 10T chain sprocket    For Hills country use the 100T pulley with included belt and a 9T chain sprocket. Depending on what type of rear sprocket you intend to use either, disc brake attach, 9-hole clamp to spokes or the HD axle wheel sprocket, use the following guideline.    #1.  For flat land Speed use a 44T, 46T or 48T rear wheel sprocket. #2.  For Hill country or a 200lbs plus man use a 56T rear wheel sprocket.