as the title says, i have made my yz400f into a street legal supermotard. i am having small issues with it though, probably because of its age. my first issues is with my rear brake, not only do i have drag to it but the rear pressure switch is staying lit after several minutes worth of riding. now that i think of it i think thats pretty much my only problem! i would like to get a little more power out of this bike if possible and was wondering what you guys think would be the best bang for buck. i have a white brothers pipe on it already and a light weight piston from what i am gathering but that would be it. this winter i am pulling the engine out and getting everything powder coated and prettied and want to go through the engine. nothing is out of range for me so let me know guys. big bore? cam? high compression? oh it also has a 03 yz450 carb on it that i have been fine tuning lately.