DRMD, I wouldn't worry too much about the engine, in stock tune you'll never strain her, the rev limiter kicks in at 5700, I hit it several times, mine is now raised to 6200, I think Carpenter sets it at 9000, Carpenter package peak hp is at around 8600, if I remember.
Warp, how much did you raise the rear, and with what, Hagons?
25-38 mpg, depending on how I ride, which is usually hard. I recently rode to Key West and back, so I got to know mileage pretty well. At 55 you could probably get near 40, but I've never rode at that speed, 65 gets 38, 70 - 75 gets 35, or close, 80-85 gets in the 30 range, above that it drops more. I have someone else's tune, further tweaked by Hanso when I emailed it to him, I'm sure with a dyno tune it could be improved.