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View Full Version : Z-400 won't idle!?


jb400exxx
03-02-2003, 04:56 PM
My friend has a Z-400. He just put a big gun slip on, CFM performance airbox, K&N filter w/outerwear and has jetted it. but the problem is that it won't idle and you have to give it a little gas when u start it or it won't start at all. when he get's it started and lets off the gas it just dies. he's tried changing the pilot jet, and messed with the needle but it hasn't helped any. does anybody know what the problem might be? We live in NY and the elevation is a couple hundred feet above sea level. thanks in advance.
Steve-o 400EX
03-02-2003, 07:01 PM
Did you try messin with the idle screw on the carb. Mine got messed up on my 400ex today so i had to fix it. It did exactly what you said. It wouldnt idle but would start if i gave it gas. Good luck.
nakomis0
03-02-2003, 08:20 PM
whats size pilot does he have in it? Does it have fresh gas?

I might be going out on a limb here but... .did you try turning the idle screw?:)
jb400exxx
03-02-2003, 08:38 PM
it will idle if we turn the idle screw up kinda high but he doesn't want it that high. it just won't idle like it did before he got all the mods. i'm not sure what pilot he has but he's tried a few different ones and it didn't really help.
toby400ex
03-02-2003, 09:10 PM
sounds like what my 400 did after i put the carb back together, i just adjusted the idle and its fine
Steve-o 400EX
03-02-2003, 10:36 PM
My 400ex actually idles better now with all my mods. When it was stock it wouldnt idle for s**t.
jb400exxx
03-02-2003, 10:44 PM
my 400ex idles better now with my mods too.
thumpinex
03-03-2003, 12:13 AM
jason just a thought when he turned the neddle in he didnt crank on it right he my have brokein ...knowing brandon :P hahaha
jb400exxx
03-04-2003, 12:50 AM
he didn't break anything that i know of, you could still adjust the idle but it just doesn't idle like it should. it idle to high, then when u lower it, it dies.
Big - D Racing
03-04-2003, 03:54 AM
I know what the problem is..... IT"S A SUZUKI :p Dump it and get a honda.:D :bandit: I would wait for the 450ex to come out, it's going to blow everything else apart.
Steve-o 400EX
03-04-2003, 01:47 PM
Originally posted by Big - D Racing
I know what the problem is..... IT"S A SUZUKI :p Dump it and get a honda.:D :bandit: I would wait for the 450ex to come out, it's going to blow everything else apart.

Yea I think thats a big part of the problem too. Expect these kinda problems from anything but honda!:macho