I just got donated a 3.5 hp edger motor, and I am looking for the best way to transfer power to the back wheel. I have noticed some using a belt, but where or how did you get the back rim with a pulley ? Any helpful websites for dummies? Also, I am going to modify a hardtail magna electroshock frame to accept the engine. Looking for the boardtracker look ! Your motorized bikes are truly inspiring ! Thanks Topcat