quad wont idle,and sparkplug going bad

[MoToX199]

my friend just put on a pro circuit slip-on exhaust and we did jet it,and put a k&n on. And now it wont idle,and the spark plugs keep on fawling out,what should we do?

[crazyelece]

Did you raise the pilot jet from stock?

[JDiablo]

try the air/fuel screw and if that doesnt work then try a 42 pilot jet

[MoToX199]

we replaced the pilot and main jet,we did 158 main,and 58 pilot,what should the air fuel screw be set at?

[JDiablo]

i think your problem is the 58 pilot:huh but try and adjust it until the quad idles,then go from there

[MoToX199]

i got it to idle,but it idles relly high

[JDiablo]

well there is a white screw type thing on the carb,with the quad running turn it to the left and that should bring the idle down or vice versa

[MoToX199]

wat white screw,and where is it at?

[JDiablo]

its more of a knob type thing,you will see it,just look by the choke lever can't miss it

[MoToX199]

do u mean the idle screw?

[JDiablo]

yea they got a couple names for it

[MoToX199]

i did adjust that,the quad idles now,but just really high

[crazyelece]

put a smaller pilot in. I was having the same problem and that fixed it. The pilot is too rich and causing the plug to foul prematurely. It is also why idling fast seems to help it because its has too much fuel for the idle circuit.

[JDiablo]

like i said try a 42 that should help it,and if that doesnt work then go next size lower 40

[MoToX199]

i takled to procircuit and they said 58 pilot waz the one that should be in there

[Goose19561]

Check to see if you can adjust your throttle cable to lower the idle. Then adjust your idle screw.