Anyone ever put a 250cc (or similar) into a really small chassis? Like what Honda did with the CRF250 junior? I've had friends put multi cylinder street bike engines into quads, with varying success. I know stuff like this gets done in local garages. (with beer) The trick would be to find a worthy chassis- disc brakes, decent sub frame, suspension and a large tank, and an engine that would be worth the trouble to do it. The idea would be to end up with a sub 200lb bike, capable of holding a bit of luggage, doing highway speed and have a seat height low enough that a 5' person could flat foot it. Ideas?