Last night I had the sweetest ride home from school ever. I used to dread riding that stupid BMW (F800GT) because that poor little engine was fighting itself to keep up with the Southern California freeway traffic (the speed limit signs are an inside joke here) . And sometimes I've made the commute on the electric bike (Zero SR) or beloved '02 ZX9R, but this bike is so sweet! Silky smooth, and I'm getting about 50mpg doing 80mph (with the 16t, naturally.)
I usually prefer to keep a bike stock, because most jet-kits, "dyno-tuners", and aftermarket pipe types tend to solve any problems by simply throwing more fuel at them, killing the fuel efficiency, making the exhaust stink, and generally trading 10mph for an extra 3hp.