Originally Posted by JerryH
So is the GY6 a Kymco design, made into a 150cc by the Chinese? Aside from the crankcase venting problem (which the earlier Honda GET engines used in the Metropolitan and Ruckus also had) what is the other flaw in the GY6? Do current Chinese GY6 scooters still have these problems?
The 150 was also being made by the Taiwanese, but it was not quite perfected when the Chinese decided to "borrow" it. The other problem is the design of the camtower on the 50cc head. It is still being used on the Chinese product today.