I'm new here, but I can't believe this oil thread has 2 pages and not one mention of AMSOIL 20w50 Motorcycle oil. Does it cause problems in these old beasts? I know in other bikes I've owned and used Rotella, the Amsoil has been a popular synthetic choice due to its additive package.
I just hope mentioning the A-word doesn't get me banned, I'm really just curious!