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View Full Version : 350X Jetting


BIGCRIP28
10-15-2004, 09:32 PM
What size jetting do yall recommend for the following setup?
1986 350X with KN filter, cobra jet exhaust system
crackshot
10-15-2004, 09:41 PM
whats your elevation?
BIGCRIP28
10-15-2004, 09:45 PM
i am at about even with sea level
crackshot
10-15-2004, 09:53 PM
how does it run good now? pull the plug and see what it looks like. If it is tan, then it should be good.
Tri-ZNate
10-16-2004, 06:56 PM
1 size higher than stock id go.
MO350X
10-16-2004, 09:43 PM
It takes time but there's no worry of top end meltdown, either.
Quoted from www.ftzracing.com :

“My jetting is okay because the plug is dark”;
I love this one...... A few minutes with a warm motor at idle or slow speed will darken a plug and the mixture can still be dangerously lean at the torque peak. There is only one way to know what is rich: that is make it too rich! Jet it up to the point where it blubbers and misfires at wide open throttle (say 3rd or 4th gear). Then you can lean it down a little at a time until it runs clean. Do the same at half throttle, with the needle position.

The guy knows his stuff about carbs and jetting.

Best of luck!