KDX220 Jetting

easy. gas off. disconnect fuel line and all vent lines.loosen front and rear boot clamps. turn top of carb towards you,unscrew slide cap and gently remove slide and leave hanging on bike. wrestle carb out from boots. dump fuel out of carb. remove 4 screws and the bottom float bowl will come off. the main jet is the brass "nut" in the center of the carb...6 mm i think. the pilot is the flat head screw that is buried down inside a well, right next to the main jet. you should unscrew the pilot , and take it out and clean it while you are in there. such a small jet, there is almost always some dirt in it. don't use too much torque when re-installing the jets. mine is a 97 220 with 40 pilot,142 main and a pc rev pipe at sea level. runs really good. i also went one clip notch higher on the slide needle. have fun