Jetting without lid on

[moto440ex]

I have an 06 450r, and im wonderin what size main jet i'll need to put in if i take the airbox lid off. My motor is completely stock, the only thing i did to it was take the baffle out.

[wolffie]

whatever your stock MJ is, just up it 1 size or so. www.jetsrus.com has cheap prices on kits and individual parts.

[moto440ex]

Thanks for you help