i'm not sure what i'm runnin for jetting (i re-jetted it 10yrs ago), but with a gnarly desert pipe, bike runs fantastic.it runs from sea level to Arrowhead(approx 5000'). my new pipe is on back order, so i'm gonna run my stock pipe for a few weeks.....question is, do i need to mess with the jetting( i really don't want to), or will it run ok with the stock pipe. ps...thanx in advance.