Ok, I have been riding my '07 KLR for the last few weeks with this setup: KLX needle, middle clip position, 150 main jet (148 stock), 2.75 turns on idle screw, Uni filter, snorkle removed, slide drilled, FMF Q4 silencer. All parts came from Schnitz. I am at 3300' msl, and recently took a trip to Ruidoso, NM where we rode at elevations ranging from 6000' to 9500'.
By most accounts I have read on this site and elsewhere, my bike should be way rich, especially at higher altitudes. However, several plug checks both at home and in NM revealed just a light tan color on the plug. The bike runs fantastic, pulls hard, etc, etc. The only downside I've noticed is mileage in the 37-43 mpg range (my heavy right hand may play a small part there
). I have checked several times for air/exhaust leaks and have found nothing. Any thoughts?