So my 03 kx250 is bogging badly from 1/8 to around 1/2. I have gone from 42 pilot to 52 with same results (42,45,48,50,52) when holding throttle constant at 1/4 it just bogs itself down til it wants to die. Does this with every pilot I tried. In Montana, elevation is 3200 ft above sea level. I...