Gonna be a bit difficult to get the "most power" out of a motor that is versatile enough to dune, trail, and drag race with. A 4m stk cyl is a great dune motor at 70-80 hp. Riding tight trails you don't need that kind of hp. For drag racing you can go as big as you want. Servals make good dune motors as well as trail motors. Not sure what you mean by sticking out of the frame though. Unless you're going with a triple I don't think that's gonna be an issue. And what did you mean by money isn't an option? Money better be an option if you're gonna build a motor! Sent from my iPhone using Tapatalk