I'm 6' 1" and I have a 750 (same geometry). I fit comfortably with aftermarket rearset (sato), the OEM set feels a little tight. People say I look a little big for the bike, but I think overall I'm comfortable, no issues.
I'm 6'3" also and I'm on a 750. I did a ride for charity once, never do that again. I was cramped, and I pissed off my bike--she wanted to race not putt by the crowds. But, that was an exception. Otherwise I would not trade it for anything.