Hi,
Not sure if it's of any interest but I've been going through a pile of manuals etc. I collected over the years and thought I'd see if these scanned easily on the home printer.
Tried it out on a couple for the CB500 / 550 and seems to come out well so thought I'd check if this is any use to anyone in pdf form.
The first is the set-up instructions for CB500 / 550 including pre-delivery service details (19mb) and the other is a short supplement for the CB550F2 1977 (4mb).
As files are quite large not sure if email is workable but guess there are ways and means if anyone wants a copy.
Cheers,
Andy