yfz6r, good to hear you're having luck. I also had one chinese scooter (a 150cc) that had all the body pannels falling apart, but the motor started every time, even after it sat all last winter. That one bike was invincible! However, this isn't the norm.
It's actually my second. I had a 150cc china scoot. Was an xtreme xm150 to be exact. It was rock solid just like the one I have now.
I am extremely easy on the break-in period though. Governed to half throttle until 150 miles, then let out little by little until about 700 miles.
The gy6 motor is a honda clone.
The only issue I commonly see in my area is people let them sit and they are too stupid to clean a carb. So they take it to the local scooter store and pay $100 for him to do it. That guy is a crook but it works for him.