I have noticed my bike rides very well in the altitude range of 2500-5000ft. No problems. With temperature, totally different. Runs great at 75-100 degree temps but once the temp drops in the 60s or below, it starts to sputter and run like jetting is off. Anyone else have similar experience? Seems to me the temp plays more of a role than altitude. My jetting is unrestricted bike, 168 main, 48 pilot, 4th clip position on one size richer yamaha needle, 2.5 turns out on fuel screw, rest is stock.