After watching videos, and spending significant time staring at the problem, I determined that my seals were SO WRECKED, that the rubber had mostly deteriorated and what was left is a metal piece that inside of the seal. I used a heat gun to melt the plastic and pried out the metal insert. What...
I ordered fork seals from 4into1.com based on my bike's year/model but they're the wrong seals, for sure.
I've submitted photos of my fork's internals in hopes that someone can help me ID them so I can get the correct fork seals.
My bike is a '73 CB500 K2
Cylinders 1 and 4 are connected electrically. 1 and 2 are connected by fuel. So, if you're having trouble on 1 and 4 it's an electrical/spark problem.
Double check you set your timing correctly, make sure you have good condensers.