Cary,
The erosion/ burning on the piston, in the last picture, looks like damage from
detonation. Too hot intake air, bad gas, low octane gas, advanced ignition
timing, wrong heat range plugs could be the cause among other things. The ring
looks like it broke due to being stuck from carbon build up in the ring land.
That is normally caused by too much heat cooking the oil causing the carbon
build up. The ring land can breaks due to the ring breaking.
Good Luck,
Mahlon
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