SOME OF YOUR NLOCAL AUTO PARTS STORES CARRY FRAM OIL FILTERS FOR THE 400EX FOR THE SAME PRICES AS THE DEALERSHIPS, BUT THEY ALSO SUPPLY A NEW O-RING WHICH HONDA CHARGES ABOUT $1.25 FOR. CROSS REFERENCE AND SEE FOR YOURSELF.

 

whats the best oil filter? and thanks for the advice.
PS i have used EMGO's any good?

 

the fram looks just like the honda filter. don't think there is much difference.

 

I use the emgo's and they work just fine
I buy 10 at a time save on shipping from
rocky mountain $2.50 each or something like
that