Got bike third hand from a guy that got it in a trade with a farmer. Only has 7k miles on it! I have no idea what the actual EPACombined mileage is for this bike, but I set it at 23 because that's the best I can get with the pickup that I would otherwise be driving in the same weather. Therefore, my graph shows how much better riding is than driving.
Inflated tires to max recommended pressure. Installed an LED taillight and an LED headlight. Installed a generic windshield. I can feel that my new helmet and coat are much more aerodynamic than the old ones.
Tested LED bulbs in the turn signals, that isn't going to work unless I replace the flashers with electronic ones. Maybe replace the battery with an ultracapacitor bank. This is basically only used as my backup bike and for riding with my wife. Otherwise, the ninja is more efficient and fun.