ive already changed gearing to 15-45 but i want it taller for supermoto/road only use. Changing to 15-45 helped quite a bit but didnt really expand top speed? Anybody use 15-42 or 15-40 and how is it? i am willing to loose a little low end because atm its at 7500 RPM's at 85-90. I just wanta bring the revs down.