what jet for a 300ex w/ a k&n filter

[dingo]

what size jet is the best for a stock k and n fliter on a 300ex

[2k2-300exnj]

you dont really need to re-jet with just the air filter i would wait until u get a pipe, or modified air box or no lid or something before u rejet that way u wont have to do it again but if u really want to now just bump the stock main(138) up one 140 i think it is

[dirtclog]

my manual says main jet for 300ex is 122 standard.

but...i swear my stock main is a 128

I never changed it with just k+n and airbox lid on.

[DEAL]

I got a dynojet needle and a 128 in mine and it runs awesome.