Ok so i want to build a moterized bike and i thought it would be awsome to take a shifter kit/JAck shaft from sick bikes parts but instead of having the chain go into the frame i would have it go out the to the back rack where i would have an engine mouted, i thnk about 4 horse...OR is the shaft from the engine spun the right way i could go strait to a free wheel on the front sprocket. Is this a good idea
