Jetting on 400ex

[400exONcrack]

I just replaced the stock muffler with the titanium 4 silencer and i need to know if it needs rejetting or a jetting kit or what.

[400EX QUADER]

yeah put in a 155 mainjet and 42 pilot jet. that should make it close. try that and see how she runs.

[xc_racer1]

ya ud have to get a new jet
call the fmf support place and theyll tell u the exact jet, but id try that cus i know when i called hmf about mine they told me to go a jet to big