Ok. I have a chainsaw motor set aside to go on my mountain bike as a "booster." My intentions is to build to where I can start it at cruising speeds and then use it to put up and down hills at around the same speed. I am not trying to take off from a standing start with the motor. My main question to start with is where to find parts like a suitable clutch. Also want to figure my gear ratio. Where would I ask about this project?