Honda 400ex HMF exhaust

Honda 400ex

[@zh2120]

0:24 was that a fart?

[@lmCIoudz]

Super clean bike man. About to order a full HMF exhaust for mine

[@KingSalmon]

Got one on my 400ex. Nice exhausts thats for sure. If you want. You can drill a few 1/2" holes near the back of the airbox lid. And gain more throttle response and power. But you gotta rejet accordingly. Probably a 175 or so.

[@va6341]

Thanks it has a k&n air filter and a 175 and a 42 runs great