I agree with experience being the biggest factor here, not size. If you are a first time rider I would suggest something along the lines of a Kawasaki Ninja 250 to start out on and also taking a motorcycle safety course.
I know a girl who runs low 8's in the 1/4 on a busa with nitrous at the track.She is 5"2" and weighs about 125 with her suit on and boots. But man does she have EXPERIENCE, like most everybody says, that is what you have to have. Can you handle the jet action of the GSXR cause if you have never ridden anything bigger than a 600--boy are you gonna be in for the shock of your life when you pony that baby up. Skilz man thats what you have to have to ride this baby!