I've never modded a bike before, but I'm planning on motorizing one this winter. I'm just looking for some suggestions on some ideas I've been having on how to go about this project. My plan is this: mount a high cc chainsaw motor (no I'm not using the standard kits for this) over the back tire on something similar to a luggage rack, put a sprocket/derailleur setup on the left side of the tire in addition to the pedal powered one on the right side, and run the chain from the motor down to this sprocket. I'm hoping this would allow a higher top speed than just a one speed setup. What I'm wondering is essentially weather or not this sounds like it will work, and any suggestions on better ways of doing it. Thanks!