by WillCRF » Wed Aug 23, 2006 4:11 am
What does your spark plug look like? That could tell you something about your jetting. We ride at about the same altitude you mentioned. On my boys bikes, we opened the top of the airbox and went with a 105 main and 38 pilot jet. We also added an Uni free flow air filter. Made a nice improvement in the throttle response on both bikes.
Will
'05 450x (Rekluse)
'07 KTM 250XC-W (Rekluse)
'05 KTM 200exc (Son #2)
'06 KTM 200xc (Son #1)