Okay guys, 2007 WR450, I just picked it up, only 13 hours and it shows. Kid I bought it from did none of the free mods, bone stock. He did give me a GTYR AIS removal kit that he just never got around doing after he bought the kid. I plan on changing the throttle screw, removing muffler insert, removing air snorkel, removing AIS. What jetting should I start off with the free mods. From what I have read, the ones in the GTYR kit are way to rich, especially at my altitude, 6000-10,000 ft. I asked the local bike shop, Grand Prix, where it was originally purchased, and they said keep what is in there even after the "free mods" are done. With my altitude and the mods done they said it should be fine. Any other opinions, I would rather not have to take the carb off muliple times. Question is, what size jets should I initially run after the free mods at my altitude? Trails being ridden for the local guys are 717, rainbow, rampart, texas creek, taylor, etc. Thanks.