Rejet for K&N Filter??

[coolhuh]

I have a stock 300 & 400EX after I put K&N's on each of them the engine seemed to get much hotter, do I need to rejet. If so the mains or pilots or both? I am near sea level and 70-80 temps.

Running lean will run hotter, this will burn your motor if not careful. Depending on if you did anything with your airbox lid, I
would try a 155 main on the 400 with lid on, or 165 main with off, or have holes in lid. Not sure on 300 sizes.
John

[dariusld]

johntammi are you talking stock jets? 155 seems a little fat for just a filter change? Look at all my mods and I run a 155. For just a filter I would go up two jet sizes.

[Nausty]

better rich than sorry;)

yeah, those are factory sizes on 155 main. H e said he could notice it getting alot hotter, so I wanted to richen him up good.
He would have to check it out with different sizes and do plug checks to get it on.
John