Jetting problem or what????

[Thumper416ex]

I have some rattle, bug at very low end but got strong at mid and top end. I'm at 400ft sea level and I run a 165 main jet, stock pipe, K&N power kit filtrer and mid-top cam. I think that it<s the effect of my cam because I lost a little bit low end but it<s seem to be a jetting problem.

My question is that's possible that my needle clip position was to rich because the bike have bugs at very low end.:confused:


Thanks

ALEX

[Thumper416ex]

Someone can help me?????

[Texan32]

your sig says you have a wb race cam. I'm not up on that cam, but since it is a race grind, that may just be the nature of the beast.

Question...how is the idle circuit? Doest it foul the plug at all if you let it idle for 5 of 10 minutes? what pilot jet are you running? What is your mixture screw? What position is you needle clip? Need more info.....

[Thumper416ex]

I'm just get the quad for 1 week and I don,t know all the setting. I sure that the pilot and needle jet are in stock form. The idle is fine.

I change the previous 165 main jet for a 160 and it's a little better but it bug again.

Before I remove the 165 main jet, I remove the end cap (canister) of the stock pipe and the bike run very well and strong. Maybe I absolutly need a free flow slip on.

[Thumper416ex]

I didn't receive my T4 slip on like I said in my sign. I run the stock pipe.

[Texan32]

That makes a HUGE difference! the 160 is WAY too big a jet to be running the stock muffler! I would drop down to about a 150-155 and see what that does. Leave the spark arrestor off your factory pipe too. That will let it flow out easier