Re: What is my engine called?
You pose a most interesting questions. They are NOT happy time or China Girl those are nicnames given them by the forums. To my knowledge there is not real way to distinguish one from the other. They are all chinese manufactured bike engine kits. I have heard they are made in different factories and each factory does things more or less differently. I can't swear to that though.
I am also told that the parts from one factory may or may not interchange. I would not be surprised to that that true either way. How to order the parts, I would just contact the dealer who sold it to me. He may or may not have what you need. This is really a kind of red headed step child hobby.
Good luck but I do assure you it is not a true 80cc engine.
My posts have entertainment value only. A bike ain't yours till it has your blood on it. Then it owns you.