I have a Jet 66cc engine and a generic 66cc engine. Both have the same issue; the two bottom pieces of the engines don't line up perfectly. They're probably 3-4 milimeters off at the edges. Interestingly, the screw holes line up perfectly to hold the two pieces together.
What brand of two stroke Chinese engine doesn't have this problem?
What brand of two stroke Chinese engine doesn't have this problem?