ugh you're making me jealous. these bikes cut the corners up so well the only thing better is a bobbed, minimalist version. but my bike must remain covered up, as a friend just starting out riding this season wants to purchase it from me... oh well, maybe ill just have to find a neglected ninja to cut up... i mean revive
dont know if you thought about these but;
lithium battery, clip-ons, and a full exhaust would lose 20+ lbs easy. those stock cans are heavy, as well as the headers! with led signals and tail light you wont need a big battery, a 4 cell could probably do it. your bike is so light you could just push start it if the battery cant start it.