Need help with jetting- K&N with no lid-stock exhaust and no dynojet kit??

[New-400ex_guy]

well im getting the girlfriend a 14th front sprocket and a K&N filter for her birthday. gonna run no airbox lid

i was thinking about just getting the jets from my dealer. i was wondering which jet i should get with the above mods??

should i change the pilot also?

im on the oregon coast so sea level would be my elevation.


thanks

[twisted threads]

I think if you keep the stock exhaust and just put a k&n on you probley dont half to rejet. If you do just the main a few size may be a 152, 155.

[New-400ex_guy]

what is the stock jet, wouldnt i have to rejet with more airflow coming in?

[Wheelie]

Stock is 38pj, 148mj.


A 40pj and a 150 or 152 main jet should do the trick. Be sure to run an outerwear........later.