Thanks Denis for the video link!
I've found a few online that have helped along the way, one series featured a gent with serious fingernails that I'm sure could tighten slot head screws up to an impressive torque with. His accent is very thick, certainly knows what he's doing even if I can't always figure out what he's saying.
To clarify, the 750 motor did not run long enough to get much footage, the video was with the 650 engine.
I too am curious what killed the 750, it was sold as "running when removed" and the story was that a decade ago the owner of the 72 Bonneville pulled it, cut up the frame to make a chopper but then never built a frame.
It came with a couple boxes of parts and the frame head with the 72's original serial number stamped in.
With the 650 running well I am impressed with it's performance and some day the 750 may get rebuilt and shoved back in. Bonnie 3.0?
Boxes of goodies showed up regularly for a while, new seat, new Amal carbs, tires... and so on.
New rocker box oil line, some bending required
Previous owner cut off the center stand mount- I knew early on this will not do, same guy that welded up the frame stiffening bits fabricated new mounts and attached a center stand for us. I believe some of the concern for frame cracking was directed at how the center stand mounted so owners were just cutting em off.
I found these to be a helpful addition to my workbench