My replacement parts from Jin arrived today, and my engine (#18, I think) is finally running properly. I had also removed .100 off the top of the piston and made a rope start pulley, while waiting on the replacement parts. These two improvements make for much easier starts and less jumping around of the engine when running.
Has anyone ordered extra rings? Sooner or later, I'm sure that they will need to be replaced. Or, does someone know the size of the rings? I'm sure that it's a metric size that I currently do not have.