Interesting.
there's an old honda shop I visit frequently. The guy assembled bikes from the crates as a kid. He knows 60's-70's hondas well. He has the "Red" book. He has pointed out to me some of the mistakes in his book.
My book says American Honda as the author and has a disclaimer also regarding mistakes.
It just goes to show that when researching facts about vintage Hondas, you have to double, triple check things, even if it comes from an official honda source.
It is my first "go to", then an original, first edition parts book. An original parts book usually is king.
I like doing the research most of the time, especially if it helps someone.
As a qualifier however, now I'd have to research Chuck Nix.
the only bike I know extremely well and have researched extensively is my '75 550F.