Just got a new '06 Foreman 500 ES. Live in the Dallas area with an average altitude of about 600ft above sea level. I frequently go to Red River, NM and want to take the bike up there. The altitude ranges from 8,500 to about 12,000ft above sea level. My question is this. What is the stock jet and what do you recommend to change it to for about 10,000 ft elevation? Also, any particular brand better than OEM?