I figure I put about 600 miles on it since I got it. I bought it from a guy who works on motorcycles. He'd tuned it up, got the lights working, etc., but I don't know if he'd pulled the cylinder and cleaned the ports. I do know that the bike is now running faster than it did when I got it, so the ports may have already been blocked up somewhat...
The piston is cheap compared to the cylinder ($20 vs. $180). As far as priorities go, I'll check the plug to keep the mixture right, work on the ratchet for the kickstart, buy a muffler, then replace the piston and rings, since the bike is running well right now.
This has most definitely been a learning experience for me. Thanks for the mantra, Ron.