I came across this on another forum (oddly enough, it wasn't a bike forum lol). It's a table of various bikes and their average fuel consumption. I went to Honda, but if anyone's interested in other bikes, just click on the make.

 

Does the 600rr really only get 34mpg? Good link, surprised to see some of those models listed, but to be fair, they are user reported so don't bet your life on this data.