I have a 2003 250ex with a fmf megamax 2 pipe and kand n filter, does anyone have any suggestions on what to put my main jet at. The shop wont do it because fmf website says to keep it stock. Anyone with 25o ex, could you tell list your mods and jetting, Thank You

 

Mine is stock. I'm putting on k & n. The way the plug looks it comes rich from the factory.

 

i got a pro cicuit full system and k and n filter, im running a 105 with the lid off, the jetting isnt perfect but it will do for now. u will also have to mess with the idle screw a lil. hope this helps