So I've been running a Korado top end on my E-50 for a good while now, a year or so. It's port matched, pulls like a mofo (for a 49cc) and is dead reliable....until now. Coming home from the grocery store today, not even running full throttle, my engine suddenly sounded like a blender with a rock in it. Hard lock...walked it home. Upon taking the head off, metallic powder falls out. I take it all down, and find that the culprit is my piston. Somehow, the piston skirts (both of them, mind you) snapped off all jagged like, and the bits got ground to powder. By some lucky chance, my cylinder wall and head survived unscathed (wtf? yay!).
Thing is...what the hell happened? Does this plague any other riders out there?