i have an 02 rmk 800, and last ride it started acting up at higher elevation. we dump sled at bout 3500 and ride up to 6000 ft. ive got slp single pipe, 10-64 wgts, slp cheater head and 410 jets. Once we get about 1500 ft up from the truck it loses top end about half the time, sometimes i get 8200rpm, others it about 7000. clutch side plug look good jetting wise but non clutch side is black. ideas? thanks