As a general proposition, the best mod you can do to your baby ninja is to reduce its weight. Extra points for reduction of rotating mass.
Just weighed my 08 250r on a calibrated industrial scale. Mine has all of the street stuff on it: lights, wiring harness etc.
320.2 lbs with a FULL tank of gas.
Gas is 6.3 lbs/gallon. The 08 version has a 4.7 gallon tank. Empty my tank and my bike weighs +/- 290 lbs.
Let's hear some of your measured weights.....How low can you get these suckers?