2005 America operated @3500 ft above the coast. AI and snorkel removed, a few holes drilled into the last two baffles of the stock slash-cut pipes, 125 Mains, NBZT (Thruxton ?) needles, 1-1/2 turns out, idle @950rpm, ProCom set on #5. No complaints. A/F @ 13/1 - 13.5/1 cruising up to 3500rpm, WOT@7000rpm: A/F 11/1. I have not experimented at other ProCom settings, however the bike was on #4 before I tuned the jetting w/wideband O2 sensor installed. Could not tell any difference w/seat of the pants dyno.