Ok,

Searching didn't really help too much. Learned a bit about jetting at least. But, I'm looking for some help from some people with altitude experience. I ride 50 percent at 3,500 feet at the MX track, and 50 percent of my time in the trails at approx 4,500 feet. Naturally the raptor starts bogging heading up big hills at 4,000 feet. From what I know, it's better to be rich than lean. But some of these hills would be dangerous to stall on.

My question is, what would you do to your jetting if you had these issues? Mechanically, it's stock. If I jet for high altitude, what would I do about riding at 3500 feet? I plan on putting on a pro-circuit or LRD but not until next year.

 

what are your mods? open air box?

 

I rode from sea level to 6000' when I lived in CA. and didn't need to rejet but I'm sure I could have gotten a little more power if I had. 3500 to 4500 is nothing. I would jet it for 3500 but your problem sounds more like your float level is to high.