ive got a GSX750ET and would like a bit more power, the answer is a GSX1100 engine but like hen's teeth to find and not cheap if you do. im resisting the temptation of putting a 1200 bandit engine in as i think it looks better with the air cooled engine. i have a copy Kat with a 1200 motor in it so if i feel the need for speed i'll get that out. but upgrading the suspension, brakes and wheels is the way to go