Re: Moped/motor bike project
This is a 20" bike right? Not a moped? It's kinds wild. I might re-sell it on ebay.
Yeah, it's hard to judge frame clearances. Why not just a motor in the middle? Use a smal sprocket to compensate for the small wheels.
Something more radical might be to get a three wheel hub, shorten the axle and offset the motor to one side, to make a tricycle with two close wheels in the back- maybe a tank, or staorage bin on the other side?
I'd get some nice alloy BMX rims either way. Annodized alloy is always popular: lightweight, and enhances resale value besides looking great.