FMF Q2 pipe & Powerbomb header jetting

[ptownrider]

How's everyone doin? I bought a FMF Q2 pipe and a powerbomb header. Just wondering about the jetting(main and pilot) and needle c-clip placement. I use a K&N filter and I want to open up the airbox. I live in central Illinois(in case you were wondering about elevation). I'm anxious to here your recommendations. Thanx.




2001 400 ex
ITP Bajas and ITP Holeshots
Laeger A arms Elka triple rates
Gray Maier plastics
Roll Design stem Renthall triple walls
K&N & open air box
AC nerfs and bumper
ASV levers
FMF Q2 and Powerbomb

[maxfior]

Originally posted by ptownrider
How's everyone doin? I bought a FMF Q2 pipe and a powerbomb header. Just wondering about the jetting(main and pilot) and needle c-clip placement. I use a K&N filter and I want to open up the airbox. I live in central Illinois(in case you were wondering about elevation). I'm anxious to here your recommendations. Thanx.

2001 400 ex
ITP Bajas and ITP Holeshots
Laeger A arms Elka triple rates
Gray Maier plastics
Roll Design stem Renthall triple walls
K&N & open air box
AC nerfs and bumper
ASV levers
FMF Q2 and Powerbomb

Howdy, assuming the engine it stock, I'd start off with a #42 pilot and a #155 main jet. (you might need a #158 main, I'd pick that up too, get OEM jets!) Leave the needle alone for now and I wouldn't mess with the mixture if it WAS running okay before. After you get the jets in see how it looks with a plug chop. Good luck!

Max