Hi all, I've just bought a brand new 2007 kxf 250 (enduro , road legal) ; it was a leftover, a real bargain for about 5000€ ! Aniway, I have some jetting problems with it... Before I say anything, take note that I know fairly well how to jet a bike (even if I'm more experienced with 2-strokes). The problem is, other that this thing is ridicoulusly sensible to altitude and temperature changes, I can't seem to read the jetting trough the plug color: My plug is always VERY white in the center, regardless of the jets I put in it... A few days ago I felt that the bike ran very rich, it sputtered and revved very slowly (jetting was 42 pilot, nhjt needle 4° clip, 185 main), so I took the plug out and expected it to be sooty and dark...WRONG! it was almost white and dry ! However the bike ran definitely rich, so I changed the jetting to 3° clip needle and 178 main and it ran way better. From that time, i tried to see if the plug got some color many times, but still very white... Float height was fine , tough I tried to lower or raise it with no results. I tried to switch from the stock cr8e plug to a cr9e , as the manual suggests if the plug looks white, but nothing changed... No air leaks in the carb boots, no air leaks in the exhaust.... Other than the plug color, the bike seems to respond well to jetting changes, but I always fear that its running too lean and that it will blow up in pieces! I read somewhere that you can't jet a 4-stroke by the lug color, but if it is so, I cant understand why my dr650 has well coloured plugs (white if its lean and black when its rich)... Do I have a problem on the bike, or should I stop to think about it and just give it some throttle?? Any help will be very apprecieted... thanks!