400ex

[Codyhonda400ex]

What are stock jet sizes for a 2003 honda 400ex?

[storms400ex]

2005 are 148 main 38 pilot, should be the same

[Codyhonda400ex]

ok thanks do you know if the fmf powercore 4 universal pipe will work on a 400ex

[storms400ex]

what you mean by universal??? just a slip-on

[Codyhonda400ex]

yea it is but it is also universal

[storms400ex]

ive got a fmf powercore 4 slip-on with a moose filter, in the summer i run a 150 main, take the snorkel off the air box, and i take the choke off, in the winter i run a 152 main, and put the snorkel back on. and put the choke back in, i keep the 40 pilot in all the time and keep the air/fuel screw out 2 turns all the time

[Codyhonda400ex]

ok cool thanks