Re: my opinion on the china girl ..
Mine is in a thousand little pieces on the floor at the moment. I just finished stripping off the paint with a chemical stripper and tomorrow I will degrease the parts. I tore it down since it had nearly 1000 miles on it just to see what wear there might be. Surprisingly there was little to none. The only issue I had so far that was a manufacturing failure is that the muffler came apart at a weld but that was an easy fix.
I guess I can say that I ran this engine pretty hard as well for I had it wide open throttle going 5 miles up a 10% grade and on the freeway. I would go out for 30 to 60 miles at a time on some days. It's a powerking 80cc motor.