That caliper looks just like some Honda ones I have, forget what they are off but have part number (one is in a box)Ever since I saw a Z1 'pull' the caliper off fork leg I've been very leary of calipers mounted in front of fork on cast lugs. BTW Matt, first time I've looked at thread in years, that hydraulic clutch conversion may work but looks way too bulky, they should have required cover to be welded for mount or machined up something that fitted into original hole (that's what I would do)