I have no reason to be dishonest, I was happy to find a site were I could ask question about honda atv's and motorcycles. I own a 400 rancher AT 2006 model, a 1981 CB750 street bike, and the odd ball in my garage is a 2007 450 King Quad automatic that I traded a 2005 400ex and some cash for. (the 400 Rancher is my wifes bike)
On a 2005 400 ex I had it only went on 1 way and was different on both ends and said this side toward engine, on the 2001 warrior i once had it only went on 1 way but didnt say anything so you had to pay attention (my brother blew his up that way), but on my old cb750 street bike the filter goes on either way and is identical on both sides. On this 2006 400 rancher AT the filter is the same on both sides but since I bought and aftermarket emigo filter I just wanted to make sure it went on either way b/c it didnt say this side toward engine but it wasnt a honda filter so I wanted to make sure.
After I posted the message on here I stopped by a honda shop in town and checked a honda filter and asked the service employees there to make sure and they said the filter can go on either direction.
Recetly I bought a disc brake kit for the 400 Rancher and after 50 miles of break in it now works great - the drums that were on the front had to be adjusted all the time - it seemed that I had to work on them every other month.