I'm here looking for ideas. I will not pass my next driving test because of parkinson's. I can still balance a bike but I run out of energy real fast. So I'm thinking of adding an engine. Won't need power for speed, but I do weigh 215, will that be a problem? Anyway, I'm new and will value any help I can get from this forum. I don't know that it makes a difference but the bike i'd be converting is an old Specialized Rock Hopper. Thanks for having me.