Good basic (cheap and easy) mods for 99 Ultra 150?

Looking for some "trade secrets" to get a little more topend out of a
99 Kawasaki Ultra 150. You know, like how some skis have "remove this
and that, and you'll get 500 more rpm," or "cut the rideplate down
1/3"..."

Things to do before (or even after) the bolt-ons. Web links, personal
advice, etc.
Much appreciated,
bikewriter71 DeleteThis @hotmail.com