K&N/PC T-4 jetting?

[InsAyneROostin]

What would you guys recommend to run in my pretty much stock 400ex (no motor work) for a K&N with a Pro Circuit T-4 slip-on? cause i heard that PC said you could run stock jets with their t-4 slip but i wanna know if it would run better with adjusted jetting? oh and what position should the clip on the needle be? thanks for your help guys :confused:

[hondaexryda]

hey i have a t-4 slip on, and i didnt get mine jetted, it runs good without, but im getting the header in couple weeks so im getting it jetted

[cals400ex]

elevation and temperature matter when jetting. here my friend with those same mods as you runs a 155 in the winter and a 152 in summer. this bike seems to run pretty good too. by the way, these are keihin jets, not dynojets.

[InsAyneROostin]

Thanks alot guys, it runs really good without jetting but since i got the k&n i dunno, it runs a bit lean but not enough to be worried about. Thanks again you guys. Peace.

[EXerHonda400]

If you have the K&N power kit thing, then if you are below 3000 feet put in the DJ146 jet, thats what i am useing and it made a nice difference combined with my WB R4 Pipe.:D

U need to rejet even with a filter most of the times. so defenitly get it done with a pipe. slip on or not.