air filter

[hondanator]

my bike is completely stock. i dont need to rejet it just to put a uni air filter on it do i?

[TheAwesomehonda]

I don't believe you need to.. Will be be leaving the lid on the air box?

[hondanator]

yes leaving lid on

[2003TrX400eX]

no you do not. my buddy just put a K&N on his 450r, and its fine.

[TheAwesomehonda]

Originally posted by hondanator
yes leaving lid on Yeah you should be good altho some people run a 42 pilot even on a stock 400ex.. They run better with it.. The 400ex is very lean from the factory.

[hondanator]

thanks guys

[Drfat400ex]

You can bump up the main one just for good measure, but you realy don't need to for just a filter.

[Drfat400ex]

You can bump up the main one just for good measure, but you realy don't need to for just a filter.

[jgar]

The first thing I did to my stock ex was throw a uni filter on it. After 15 min of riding my motor was so hot it was smoking..... I pulled the header and removed the welds then rejetted. Now Iam running a a 155 with the uni, welds removed and stock motor. I have the stock pipe on too.