Thank you for all the advice and discussion!
I will check today after work. New C Spanner being delivered to pull the ring nut today as is. A second set of eyes tonight will help identify if it's the crank or gearbox side of the equation.
I'll check as directed. I have a feeling it's likely oil that entered the clutch hub over winter as the bike sat. It didn't have an issue when parked last year and suddenly does it first test ride after winter. I overfilled the gearbox last year by mistake and had a major mess as oil leaked out of the bearing on the left side of the bike over many months a little as a time.
I never had the bike higher than 5mph, it was "slipping" or "shaking" at even the lowest speed while the clutch was fully engaged so I never got it up to speed. Just limped it around the block.
P.S. Good to hear that Richard. My father explained the different beast that is his 6 spring clutch when I asked him about my issues! Good luck and enjoy.
Having some fun... Thanks again all.
Long delay, got sick with sunburn so took a break for working on the bike while I healed.
Rik was correct, it was that spring. The ring gear over that shock spring worked it's way so loose that it was slipping with the small amount of force it takes to kick the engine over. I believe that was also responsible for the shaking I encountered with the clutch was released and full engine power tried to turn the gearbox over. I don't have the bike fully assembled to ride just yet but I feel as if it's corrected.
I rebuilt the clutch anyway, gave it a good cleaning and the outer metal parts a nice soak in rust remover and a nice light oiling to protect it afterwards.
For some laughs, here's how I compressed the clutch spring for re-assembly.
