Knew a guy that put a Kawasaki motor on one, not sure what league that was in, but he was road testing it in 1st gear, only had the frame and lower plate, no roll bar or air foils yet, hit second gear about the time he hit a bump, it went air born, flipped into a ditch, they thought he was dead for sure. He was a lonnnnng time in recovery, not sure if he ever got over it really, that was 20/25 years ago