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View Full Version : 400ex Jetting Please Help!



FBRacing76
05-01-2004, 09:30 AM
Hello,
I bought a used DMC Alien exhaust off of here a couple days ago an have recieved and have no idea how to figure out my jetting. I got a Dyno Jetkit for it but dont know what jet to start with. So now the 400ex will have DMC Full exhaust, open airbox, and a K&N w/ outerwear and I live in Ohio. Could someone please give me n idea for my jetting. Thanks

FBRacing76
05-01-2004, 10:49 AM
come on guys!

HiZ
05-01-2004, 01:33 PM
42 pilot jet
replace the needle and put it in the 2nd slot from the top
and start w the 142 DynoMain

I think,but you will have to play w it!

That's where you should start!