I want to motorize a Schwinn Stingray.. I love the chopper look. Has anyone mounted a Skyhawk Whopper Stopper engine onto one (the one from bicycle-engines.com)? Will it even fit? Ive heard the gearboxes are unsusally loud, but this might have been fixed? I would go for a 50cc Dax but im worried it wont have enough power. Any opinons?