At 7000 feet altitude, and without air pump, stock pipe without arrestor, What is some good main and pilot jet numbers, 08 klx 450r wont run down low and backfires alot and gets hot too. It´s been like this since new and seems to be getting worse. I have it dismantled in my garage right now but I haven´t got the jets out yet and the dealer can´t remember what he put in there, I´ll find out today but I know it´s lean. Thank you