removing choke

[Diedrich]

i removed the choke on my 300ex and was wondering what size pilot jet do i need? i know its a 42 on a 400ex but thought it may be different for a 300

go up 1 or 2 sizes

if im runnin a 45 and im taking my choke out what do i do...drop down to a 42 or stay the same?

[JD400exrider]

I believe it goes down to a 42 on a 400 ex. Not sure on the 300 ex. Racer x it makes it start eaiser

wouldnt i be getting too much air for the amount of fuel if i went down to a 42?

[cals400ex]

if yours runs good with the 45 in now, leave that in. my bike was way rich with a 45 in when i had a factory gutted pipe, no airbox lid, and removed choke. with those mods, actually, a 42 was making the plug a little black.

my dad is a mechanic and he said that u dont change the pilot jet and u are needing to change the main jet because u r gettin more air when u r at full throttle but while on the pilot jet u get less air so removing the choke doesnt affect the pilot as much as it does the main jet...and i noticed this on my bike...it seems to sputter up high like its getting too much air and not enough gas but down low it is way better

come on guyz i need help with this...do i need to go up on the main jet

[cals400ex]

tell us what main your using right now. with just an x-6, sparks told me to run a 160 keihin. with an x-6 and no lid he said around 165. you have to remember, these are just guesses. i would stick to the 45 pilot. what color is the plug?

my jets r direct from sparks...i dunno what color the plug is..i ran what sparks recommended and it ran flawlessly until i removed my choke