I've gotten the general idea that a 426 exhaust will fit my 98 yz400, but I want to be positive before I buy something I'm looking at. I did some searching, but nobody says it outright, and I can't find a local yamaha dealer who can answer my question. So outright, will a yz426 exhaust (fmf titanium 4) fit a yz400f? Thanks a lot. P.S. Nice call Gray on the 30mm steering stem bolt. Called (the same) yamaha dealer and they told me 32mm... but I went on my instinct and listened to you. Thanks man!