I dont know whats wrong, i cant get over 85 mph on my 00 Xr650L, its desnorkelled, slide drilled, uni filter, needle shimmed, stock exhaust with baffle out, rejetted 158/55. The bike has 6000 miles on it and I believe valves never been adjusted. Could that be it?? I'm not a great mechanic but i think rpm's dont get as high as they should. the bike sounds the same at WOT in 3rd gear as it does in 5th at 85 mph! Thanks for any replys!