Speedo & Tach Model Year Interchangeability Question

[JoeMama]

I'm working on re-habbing a '71 CB750. The bike currently does not have a tach and the speedo looks a little dicey. Are tachs and speedos interchangeable at all between model years? Since it may take me a while to find / afford 1971 tach & speedo, can I use ones from later years at all?

 

[grepper]

I believe anything up to 78 will work, except for the Hondamatic ones.

 

[JoeMama]

Awesome! Thanks!