jetting problems!!

[CrazyCat420]

I have a dvx400 I put a hmf header and pipe on and changed out my main jet quad was runing great I then put a new intake cam in and begain running lean we bumped up my piolet jet and now I am running rich some were after running quad for a while when I shut it off I get a big puff and some times small flame out of the pipe I know this can not be good!!  it seems to run fine when I hit the gas hard and stay on it and I do not get much back fireing when I let off but on the bottom end when I try to put along it I get a bit of hesitation and it seems like it wants to die on me?? 

any one have any Ideas??
thanks Crazy cat

[IT200]

You went to big on your pilot jet. Flames out the exhaust mean to much fuel. go back to your original pilot jet and raise your needle a noch.

[CrazyCat420]

the stock carb on these quads do not have an adjustable needle on them.

[J.D.]

Go to a z 400 website and look around...Or get a needle out of a DRZ 400 .

[Chuck_Norris]

touch base with bigworm3699 He just did some jet work on his DVX. sounds rich though

[reloader50bmg]

GO back to your old pilot jet, shim the needle .020" to .030" you will be fine!!!
check float level too!!

[BIGWORM3699 ( ECP RACING)]

the needle is adjustable. I raised mine 2 notches