I run 135 main jets and 17.5 pilot jets. At 7,200 ft I run a 270 to 340 pittot jet, depending on air quality. I do most of my riding up high, I unload at 9,000ft. I use a 400 or 420 pittot jet then go to a 500 or 600 on the hills at 11,000ft to 12,000ft depending on air. The 400 is very trail safe for me at this elevation, my pyro reads about 1,100 to 1,200 degrees in midrange and goes to 1,250 to 1,300 at full boost on the trail. On the hills with the 500 jet I see real cool temps 950 to 1,150 degrees, the 600 jet I see 1,150 to 1,250 degrees but I do not run down the trail with ethier one of these jets because my temp goes up right now and scares the hell out of me.