This Chinese Engine style or Honda Clone was made popular many years ago by Honda Motor Company. Some call this the E22 design. We realized more than 10 years ago what this Chinese Engine was all about and have specialized in this engine by providing parts, service, and selling thousands of ATVs, Dirt Bikes, Go Karts and Mini Choppers that were all using this engine.
We have seen this engine in 50cc, 70cc, 90cc, 100cc, 110cc and most recently being introduced as a 125cc. We have seen this engine with electric start and with only kickstart. Some have the electric starters mounted below the cylinder and some have the starters mounted on top of the engine. Some have reverse gear, some have only 1 forward speed such as the full automatics. The Chinese Engineers have twisted this design into so many different configurations, yet most parts still interchange between the different engine bore sizes.
MANY INTERNAL ENGINE PARTS ARE THE SAME IN 50cc, 70cc, 90cc, 100cc, and 110cc. FOR EXAMPLE--ALL USE THE SAME CLUTCH COVER GASKETS