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SNIPA
08-02-2001, 01:43 PM
Does anyone know the stock size main jet for a 99 300ex?
I am going to run a modified airbox and choke removal.
What size should i change the main jet to acomodate this?
Thanks in advance.

Wheelie
08-02-2001, 08:05 PM
Call a Honda dealer, ask for the service department.

TREX400
08-02-2001, 10:44 PM
I looked it up at ronnies.com on the microfiche, it show a
#122 main jet and a #38 pilot jet. The fiche is usually right.

400exRacerX
08-02-2001, 10:50 PM
yep its a 122 my friend has a 300 with a pipe, k&n, and no lid and he runs a 128, 40 pilot.

SNIPA
08-09-2001, 07:06 AM
Thanks alot guys....this will get me a good start!!!!!

08-09-2001, 09:38 AM
Hey that ronnies page is great! I can't wait to break something to use that again!