FCR 40mm

[BigThumper33]

Hey, I'm curious as to why I haven't seen many guys...or any if I can remember right, running the FCR 40 mm on their 400exs. I've noticed I can pick one up on servicehonda.com off a CRF450 for less than the over priced 39's! and I've read that they are a better carb...

[lilpoppy]

well from the research that I did I have heard that the stock carb already overfuels our engines and the 39mm is quite a bit more. I think a few guys do use the 40mm but they have a lot of mods and porting done.

[lilpoppy]

Basically the 39mm is a better match for our engines.

[BigThumper33]

I've seen guys run the 41mm without problems........