As I understand matters, this forum used to have its own Wiki (link now dead) and that someone in this forum was the principal maintainer for the Wikipedia R65 page.
If we still have a Wiki, what is the URL please?
If the maintainer for the Wikipedia page is listening, I attempted to edit it last week to remove the incorrect "small frame" paragraph and replace it with a more accurate one talking about the short sub-frame/swing-arm/forks giving the illusion that the R65 is a "small" bike.
But my edits were reverted rather promptly.
r65s of course run the same size main frame loops as the other 1979-1984 bikes, the only difference being the tank mounts and the location of mounts for electricals (and that varies between 1979!1980 and 1981~1984 models too).