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					Originally Posted by cody  Crazy.  Where'd you learn that? | 
	
 About the rings rotating? The piston guys mentioned it. Between the cross hatching and piston loading/wobbling, the forces on the rings which are basically just springs cause them to spin slowly. Something in the neighborhood of 1/1000th of engine RPM.
2 strokes have to be pinned to keep the gaps from hitting the ports.