E model, so FCR carb. Home elevation is 7900 feet, ride mostly between 4500 and 7000 feet. Occasional runs from 8000 to 11000 + feet. Current jetting which has been really quite good..... 140 Main, stock odbx needle on 5th clip position, fuel screw at 2.5 to 3 turns out. I have an emn needle that I'd like to use, so, what clip position should it be, and will any other jetting need to change. The current set up has been very vercitile, and I only have slight complaints. Point me in the right direction, thanks all!