400ex stock jet settings

[ny300exrider]

hey guys i want to put my stock pipe and airbox lid back on my 400ex and need to know what the stock settings are. i have changed the main jet, pilot, and the needle so i need to know what all of these are stock from the factory

i will be running a white bros air filter with the lid on and nothing else so it would probably run better with a size or two higher than stock on the main jet. thanks

[cals400ex]

stock specs:

mainjet: keihin 148
slow jet: keihin 38
needle: keihin B44A
needle clip: middle position (3rd)
fuel screw: 2.25 turns out from lightly seated

[ny300exrider]

thanks cals, slow jet=pilot correct?

do you think a 150 main would work better with an air filter with lid on, or keep it 148

[cals400ex]

just for reference, i think in 05 they changed the needle and the fuel screw setup. yes, the slow jet is the pilot jet. i would probably leave the 148 in unless you are at really low elevation levels or in really cold weather. remember, jetting will change several times a year....most people just either don't know or don't go through the hassle of changing jets several times a year. good luck