We'll see on this tank how my milage is with the "stage 3" stuff added to my bike. It was running crappy before but I was getting better milage than I was on my 05 FZ6 (fuel injected and half the cc's). My "cycle" is mostly highway with some city driving and the FZ6's stock gearing meant 7-8k on the tach at freeway speeds on the Houston Autobahn. I was running a steady 40mpg on the FZ, regardless of if I behaved or not. Bandit was returning 45-48mpg before it was in the shop.
The wife's bike, due to some crazy gearing, gets 50mpg+. Its not nearly as fast as a bandit (or the fz-6) but it'll embarrass any cruiser on the road aside from the valk, v-rod and v-max. Downside to the gearing: gotta downshift at 70mph to get any real acceleration.