Go on Thumpertalk.com for your jetting. Set it up for 7500-8000' & don't worry about it. Once I finally spent a couple of hours dialing in my 2-stroke I've never changed it & they're way more finicky than the thumpers. On a normal riding day you'll start at 6000' and be at 10k in no time! Once your carb is dialed, spend an afternoon in the rocks on Webster pass dialing in your suspension.