[jtfstone]

Rode flat out at above 13,000 at Breckenridge, CO last year. I didnt notice any real loss of performance on the mountain peaks. Just rough rocky trails that tore up my ITP holeshots. The only performance mod I have is the slip-on FMF exhaust. Honda dealer told me that due to riding at altitude, I wouldn't need to install a programmer and he was right. I ride between 6000 to 13,500 ft with no noticeable performance issues.