I'm leaving for South Fork, Colorado in 10 days and was wondering if someone could give me there high altitude (10-12K ft.) recipe for this bike. I took a Sportsman 400 up there a few years ago and I can't find my notes on what I did, but it was perfect. I'm pretty sure I went 2 sizes down and up 1 on the needle. I don't think I changed the pilot. If you have any suggestions on the Raptor also, please speak up...it's probably not going to be easy with it's 2 carbs. they tend to run lean anyway, so maybe I'll get lucky.