I just ordered A new set of 26" AMS swamp fox tires, a dyna tek cdi, and a KN air filter. I live missouri and do lots of trail riding with muddy forest trails, rocky hill climbs, and alot of general riding. I have plans to go ride the paute trail in utah the last week in july. Will be riding from 4000' to 12500' elevation. I was just wondering if any one has these kinds of mods and has rode in this kind of altitude. And do you think i will need to re jet my carbs. Also does any one know where I can find the repair procedures for adjusting the valves, and what the specs are?