Ive been trying for A while to find a "formula" or way to calculate the necessary jet size for high altitude. The factory stock jet or recommended size is 380 at sea level with high humidity. How ever I ride anywhere from 6,250-9,000 feet, what should my jet size be? Also how to I measure my airscrew position, when it says 1.5 turns is that measured by fully tightening the bolt than unscrewing it 1,5 times? Also this may be a dumb question but is the air screw the same as the idle screw?