Just as a tidbit, I think you are right on. I am no tech or collage prof as some say they are by any means, but I will say the last new bike(my very first NEW one, proud) I bought (before my present 1100 Silverado) was a 750 Virago in 82, still have and ride that one too
Besides cosmetic things, I see not much difference in the v-twin yamaha engine, guess they figger"if it ain't broke, don't fix it". My 82 750 and 06 1100 uses the same oil filter eveneek: Good tough engines. Have fun with your new ride and ride safe.