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red_rider_069
05-26-2009, 07:56 PM
so i moved down to AZ to go to MMI
and i rejetted my 400ex
but i dont know what i did wrong, elevation is 1800
anyone have 1800 elevation jetting my 400ex?
specs are below, i dont have any other mods yet, totally lost, i took it to school changed out my jet and a few days later my plug was black i know that means im runing rich im not dumb, but i dont really want to take my carb apart 50 times to get my jetting like i use to have it, any one in the area with similar mods?

red_rider_069
05-26-2009, 07:58 PM
oh yea i changed to a JE piston but thats about it compression is 12.5:1
i put a 165 in my main needle jet, clip on groove 3 of the jet needle and stock pilot jet..
so any ideas?