I already removed the whole motor today since it is difficult to remove the piston with the engine hooked up to the frame. I'm going to take the little motor to a friend of mine who is a motorcycle mechanic. The reason for this, is that I don't see anything wrong with the piston, cylinder,head or rings. It seems like the cylinder was machine sanded on the inside. It has like a square pattern all over in the inside ( more like rhomboidal pattern), which is weird. The rings are loose a bit when squeezed in but they expand much more than the piston. I would think that bad rings would be embedded in the piston ring guides, but again I'm new to this. I was surprised that the engine is so easy to remove from the frame and the size of it is really small. I know my friend will be surprised too once he sees it. There are not that many Italian mopeds in Mexico.