[tknj99]

Im at 600' elevation and did not have any noticeable issues with the bike running lean when new and stock. I did later modify the exhaust and airbox and then had to turn the a/f screw out a bit as well as add 2 washers to the needle jet and go from 105 main (stock) to 115 main.
To modify the stock carb you'll need a hacksaw to cut a center groove in the tamper-proof screws and then late replace these screws.