i put 32mm carbs on a 1200 bandit engine and their was a marked increase in bottom end and mid range, it pulled to 120 easy but i ran out of road but it still had more throttle left. (plus my fecked old body can't take any more than that) i reckon it would pull at least 130, probably more but im not arsed about doing a 140mph plus. round the lanes it was great hardly needed to change gear much, just so much better that the 36's for that kind of riding.