Wow- great info!! So my son-in-law called me one night last month; he was cleaning out his Grandfathers barn and found this 650 under a tarp in a shed by the tractors, apparently Grandpa was rider back in the day and the bike still had 1984 tags on the back. He asked if I wanted the bike and I couldn’t say “yes” fast enough! So it’s my garage now and I plan a full restore, back to stock, as much as possible. But many, many thanks for the pointers and advice.