I just just got a used 04 z 400 which I bought off of ebay. I just got the thing out and started riding it and it feels real good, but im starting to notice a problem....wonder if anyone knows what this may be?

While the quad is idling in neutral, and with the clutch pulled. If I just quickly push the throttle, not revving it, but just tap it real real quick, it will totally die out..making a wierd noise. It doesnt do it every time, but if i keep tapping the throttle it will die.
This is kind of scary since I just got it..Anyone heard of this?? Any help greatly appreciated...

 

id throw a new plug in.

check that the choke isnt on or kinked or anything

clean the carb

make sure the air filter is clean














PUT GAS IN IT[img]i/expressions/face-icon-small-happy.gif[/img]

 

My bubby has a 03 Z400 and his does the same thing

 

The only time it should do this is when the bike is first warming up and thats it. If it does while your bike is warmedup and does it than the jetting is probably wrong. My kfx-400 only does it when its first warming up.

 

Has there been any mods to it? exhaust, air box, or filter?

 

No my quad is bone stock... and it doesnt seem to do it so much after it is run a bit. But it did do it once. Hope it is ok. Warranty gone Aug 2....

 

mine did it, adjust the idle a little. Also make sure your filter is clean

 

Depending where you ride, the stock jetting might need to be tweaked a little.

 

relax relax...its ur jetting.....prolly loading up or leaning out on u.... just put a new plug in it, ride it for a while and then pull the plug and tell us wut color it is!!! should be tan not black not a real real light brown almost white! if its black ur too rich vise versa.......

also make sure ur idle speed is correct!

-bLuRRRR27-

 

lol my warrior does that... well it dont die just cuts out for a sec but u have to hit the throttle really quick for it to do it... jetting but its fine when i'm riding so i dont care lol