mineralgrey01gt
01-02-2010, 10:57 AM
My 400ex backfires a good bit and i think its the carb needs to be setup right. It has a K&N filter but no lid and a supertrapp pipe as far as mods to the engine i know of. I need to know what the stock jetting is so i can start messing with this thing. Also i noticed a nut is missing off my header pipe (which im about to take off and grind the welds down) so ill make sure that is buttoned up nice and sealed right. Also ill add it will not idle until its been ran for quite some time.