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View Full Version : my z wont run in high rpms help!!!


jared_scarboro
05-18-2006, 10:00 AM
ok i have an 05 z400 it will idle good but when u rev it up it starts backfireing and spits and sputters please help
edltz
05-18-2006, 02:26 PM
I would start looking in the ignition
YFZ450Ridr
05-18-2006, 02:39 PM
could be a clogged jet or just jetted wrong all together. and make sure your choke isnt on, sometimes people forget about them. mine did that like you described and i had little pieces of sand/dirt in the bowl for what ever reason and it made it sputter.
jared_scarboro
05-18-2006, 08:30 PM
could it be a vacume hose i dont know if i put it back right when i took it apart none of the hoses are connected
TheZis2Fst4U
05-18-2006, 08:55 PM
if your airbox lid is off then put it on and see if it makes it better... Sounds like your jetting is off.
93MX6LSV6
05-18-2006, 10:27 PM
The choke has been known to get stuck on these quads. I suggest buying a pull choke off Ebay for like 10 bucks. Also, not to insult your intelligence, make sure you have plenty of gas in the tank. Only other thing I can think of is jetted improperly if it is jetted, or you took the air box lid off without jetting. Post up after you check those things.

Stephen
jared_scarboro
05-19-2006, 09:08 AM
plenty of gas lids on but the hose from the tank to the cab isnt on but its not the one with gas comming out some one please take a picture of where all the hoses go and come from the carb
arcticDVX400cat
05-19-2006, 09:08 AM
id say it was ur jetting. if u got a new exhaust and u dindt rejet it thats prolly ur problem
jared_scarboro
05-19-2006, 09:20 AM
motors stock every things stock
kc 300EX
05-22-2006, 12:58 PM
Will it Rev in neutral?

I had a similar problem, my quad revved fine in neutral, but once in gear it would NOT rev, and it would just bog and sputter.

I had to replace my CDI
kc 300EX
05-22-2006, 12:58 PM
Will it Rev in neutral?

I had a similar problem, my quad revved fine in neutral, but once in gear it would NOT rev, and it would just bog and sputter.

I had to replace my CDI
jared_scarboro
05-27-2006, 11:41 PM
no it wont rev in neutral either
Byte
05-29-2006, 06:44 AM
As mentioned above, did you check if your choke was stuck? Happened to me...
jared_scarboro
06-01-2006, 06:38 PM
thanks yall but it was the wiring harness