I realize this is an old thread, but I thought I'd add some useful information. I've always gone by the Oil filter cross reference on the CalCsi site.
http://www.calsci.com/motorcycleinfo/FilterXRef.htmlThey break down some filters and compare the filter construction and total filter media surface area. The C14 isn't listed explicitly, but I've cross referenced the OEM filter number against other bikes in the list and you can use any of the filters in list [5] on the site.
I prefer to use the Mobil 1 M1-110 and have used them on all my bikes except for my SV1000 which was a different thread pitch. They aren't all that expensive either, $17.32 2 pack from Amazon with free prime shipping.
I just wanted to point this out because I don't see the M1-110 in the oil filter list in the Wiki.