View Full Version : New Pipe and Silencer--Help Jetting
Hey I just got a Sparks X-4 Complete exhaust, what I'm needing is just an idea of where to go on the jetting. I just wanna get it close and go from there. My signature says what I got. :p
Wheelie
03-26-2002, 08:57 AM
Airbox lid mods??
Dave400ex
03-26-2002, 09:22 AM
Go to WWW.SparksRacing.COM Then Click on Technical Tips and 400X Jetting Specs. That should Help you Out.
Checked it out that ought to give me an idea, Thanks for the help!!!!
knighttime
03-27-2002, 08:20 AM
pilot jet = 42 or 45
main jet = 165 or maybe higher
needle jet = lower it one notch
also, modify your airbox if you haven't already
and remove the choke after you have it jetted correctly
Dave400ex
03-27-2002, 04:44 PM
Not a Problem Rob12. Let us know how it Runs.
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