im putting the 300 kit on. what else do i NEED to do? the bike is stock i have exhaust on the way and a 13t sprocket any other help?

 

You will want to rejet the bike for the exhaust and 300 kit. Personally I'd leave the airbox lid on, but remove the snorkel, or maybe open up the airbox opening a tad bit more, say double what it is now, like a 3"x3" opening or so. The airbox is pretty soft material, you can cut it with an Xacto knife, dremel tool, or a hacksaw/jigsaw. Depending on what you ride for dirt/street mix you might benefit from new tires as well if you still have the stock 603's.

 

Yep, rejet. I have the KLX 300 DJ kit, a rocket I tell ya.

 

is that the stage 2 kit you are talking about from dj

 

That is the only kit they make. Works great on the 250s too.

 

& I am runnign no lid with it (per instructions)

 

Yep, ditto here.

 

Exhaust change at least the fmf powerbomb header fits the stock muffler its 199.00

 

do you have the part number for the fmf power bomb header?