Others know the subject better, but,I will put my oar in the water,.. Do you recall how it rolled over before you went to work on it? A vefore and after would rule in or rule out causes, Why was therre a broken ring? Sometimes for some motors both standard and oversized rings were available.. New rings need end gap set by fileing so the have a gap of roughly 4 thousand per incy of bore diameter, Some method to prevent ring rotating on piston may be overlooked an cause binding. It is possible the pistons are 180 degrees out, of position,
Motors that have take a swim while running can have bent rods, bent cranks or damaged pistons. Usually such parts look ok until they are checked with dial indicator, surface plate or checking fixtrue to pick up twist or bends,
If you did not set end gap of each ring to cylinder it was to be used in, that is where I would start looking, If rings ccme in OEM container I would check part # also,
Good Luck
Louis
