My 2007 is still pretty much stock, but I am slowly but surely going to get it into a semi-track bike state, then full on racer next year.
The engine is fantastic, but yeah, you start seeing 11-12-13-14,000 and the speed builds pretty darn quick. My first few days on it and my wrists killed me from limping around the Seattle area.
I can't wait to deep six the stock exhaust and that huge cat, should save a bunch of weight.
My only complaint is the brakes are no where near my Vesrah/Steel lines/Motul setup on my 2000 racer. That will change though!