[codytcook]

What exhaust works best on a 07 CRF 100 with a k & n high flow air filter?

[campcrf]

we put an fmf full header and exhaust kit on my wife's 05 and it made a big difference.

[taylorrep]

F.M.F. is hard to beat just make sure you get the carb re-jetted when you add the exhaust. This bike is really lean from the factory.

[rocketman]

We had a CHM on my sons 100 before we sold it. Made nice power increase,sounded good,made well! I still have a new head pipe,i would sell it for $20 plus the shipping cost. you might call them and ask how much for the tail section if interested. http://www.chmexhaust.com/

[JohnSBA]

I went with FMF powercore 4 with spark arrestor and am very happy with it. Along with small jetting changes (98 pilot jet and opened airbox) the bike runs *SO* much better than in stock form; it starts first kick no choke, idles perfectly, and revs up/down smoothly. At under $200, you can't beat it.

[rocketman]

Sweeeeet! Enjoy the ride!