New Pipe and Silencer--Help Jetting [Archive]

View Full Version : New Pipe and Silencer--Help Jetting

03-26-2002, 07:50 AM

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.

03-27-2002, 07:39 AM

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.