if the cylinder walls look fine (no gouges, scratches, cuts in the ports, etc) then they are fine. No need to bore them out (you really don't want to bore that much as the port walls can be thin in some places).

I would check the cases (bearing journals, etc) and the heads to make sure there is no damage there. If there was metal above the pistons, check the heads to make sure they didn't get nicked up. To properly inspect the cases at this point, you need to split them and take the crank out.
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Charles Gallant