Well I ordered a set of crankcase seals for my 1977 Honda CB550F that I'm rebuilding and wouldn't you know it, the one I need the most is discontinued.
It is part #91207-370-000, (micro-fiche section E-15 #39), which is a rather large rubber encased metal plug/seal that sits right beside the drive sprocket. At some point in this bikes life, that plug was chewed up by the chain (as well as a bit of the case around it). Does anyone know of a source for discontinued seals? I've already checked several Honda sources to no avail.
If anyone has an old one laying around, I'd be glad to take it your hands!