Jetting my 400ex?

[ZQ8Dude]

Im here in North Ca.

I just ordered a Yoshi full system and i need to know what jetting i need.

Its my only engine mod. No intake yet.

[adavis4]

i have the yosh rs3 full exhaust with stock intake. i ride withe the lid to the air box off and i used a 170 main jet. oh yeah im in atlanta.