K&N and Slip-On Exhaust but Jetts???

[Kalejime]

Guys... New here... Hi to all!... I put a K&N Air Filter on my 2007 400ex and a Lexx Slip On exhaust... Im a good rider but a crappy mechanic...

Whats the right jetting combination for this two things? Nothing else has been done to the motor or will be in the near future...

Thanks,

Carlos
:devil:

[redrocker]

put a 165 main in and
try that for starters

[450r ride red]

155 main will be perfect

[Kalejime]

Thanks a bunch... Im really lost... this is just new to me you know... Let you know how it goes...

[BEAVER.989]

Try a 155 main, 42 piolot and shim the needle .032".