I was certain that I had used the later 3LN pistons and rods but I have used the older 2KR bits. If I can get the bits I'll go with 3LN parts for the rebuild including the head. Keeping it all stock, apart from cutting it in half, should make it reliable.
Just a very quick check and the crank and rods seem ok, by feel only at the moment. I don't think this piston would have been good for many more miles though. Obviously trying to compress an exhaust valve was a bit much.
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