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View Full Version : i need someone who knows about a 400ex carb !!!


1badex
11-02-2004, 02:54 PM
watsup , i know this is asked alot but i have a 400 ex with a uni filter and a white bros full exhaust...... i just bought a jet kit and dont know what is the proper jetting to make this run like it should? thanx
11-02-2004, 03:08 PM
48 pilot 152 main will get you real close!
11-02-2004, 03:09 PM
maybe 155 main!
sickmojave
11-02-2004, 03:09 PM
Originally posted by GNCCer
48 pilot 152 main will get you real close!

why so big on the pilot jet???:confused:
1badex
11-02-2004, 03:10 PM
thanx for your help:D
sickmojave
11-02-2004, 03:13 PM
I would say a #40 or #42 pilot jet and a #155 K main jet.
mojoe2878
11-02-2004, 04:15 PM
Originally posted by sickmojave
I would say a #40 or #42 pilot jet and a #155 K main jet.
sounds good.
a 48 pilot just seems too big for those mods. im running a 48 pilot with a 440,full exhaust , web cam, uni filter and no air box lid.
crandles
11-02-2004, 05:43 PM
What jet kit did you buy? It should have a sheet telling you proper jetting for your mods and altitude. I know the dyno jet kit does.
1badex
11-03-2004, 10:43 AM
its a fmf kit
EPDP99
11-03-2004, 01:30 PM
Why has everyone gone up in pilot sizes. I run the stock with my 465. Should I up this to a 42??? Trinity racing says stock pilot is fine.
crandles
11-03-2004, 03:58 PM
You up it if remove the choke on the stock carb for better flow. The 42 makes it so it starts better without a choke.:cool: