please help

[curious george]

i have a 04' 400ex. i had a dyno jet 142 main with the eclip 2 notches down on the needle(mybe three cant remember) and the fual mixture screw turned out 3turns on my stock 400ex carb. i need to know what i need to do for this 450R 04' carb i have it will not run right at all. it is getting to much fuel. it will run like 1/4 throttle if you snap it it will dye and if you give more then 1/2 it will dye out as well in any gear but neutral. i have the fuel mixture srew out 1 1/2 turns.

what should i do please help!



i have an fmf slip on that is it for that modifacations there. closed air box.

[450rrider69]

if its dieing out ur lean. bump up ur main jet alittle.

[Smidgy]

yea it sounds like that you may be quite a little bit lean, definately start bumping up ure main