Okay, the one in the picture in my first post is now a tad cleaner and I broke down the rear hub and cassette for a good cleaning and re-lube. Replaced the 40psi rear with a 65 psi one I had laying around. Cleaned the chain and front sprockets. Chain probably needs to be replaced as it's pretty nasty, but without a slack tool I'm only guessing on the actual wear. The whole drivetrain was covered in what looks like automotive white lithium grease and had tons of dirt and debris packed into everything.
Took it out for a ride and already like the improvements. Rear doesnt seem so spongy and seems to have a much smoother ride. Learned a lesson though: double check your brake cables. I didnt check the rear before heading out on the road and when I tried to brake to slow down for a turn, I almost hit my neighbors car. In 25 years of working on my own bikes, I've never done that before. Old age is making me careless
