Out of time-space update:
Pulled two of the four plugs (she has two per cylinder) drizzled in a little Marvel Mystery Oil and let sit. Applied jumper cables.
Results:
Engine turned over easily and smoothly. Appears to have good compression. Spark plugs looked great, as in a little on the rich side.
My two big concerns of the moment are; getting the tank clean enough to remount and refuel, probably need to replace the main fuel line, since it's rock hard. (Probably need to replace all of them!) Second problem would be the Hydraulic Valves that I was so keen on. I know they've bled down, after 16 years of sitting and if they don't fill back up on their own fairly rapidly, I may have a somewhat serious problem on my hands. Gotta get her first problem fixed to facilitate the manifestation of the second problem. In my experience, letting hydraulic valves idle and giving the occasional rev while they warm up, is typically sufficient to get them filled and working properly, so I'm not tooooooo concerned. There was no sign of valve/piston interference while I turned it over, and with the plugs out, the metal on metal sound would have been really obvious.
Confidence is high.
Here's a pic with the only damage to the bike, a few storage dents where things where dropped on her tank.
View attachment 147499
Otherwise she's like new. Even the seat is perfect. This bike has 20k miles and is 33 years old.