Especially for a piston that is available. Next time it may be pieces of it destroying bearings. Out comes the same price for the piston plus the crankFrom looking at the "before" pics, I wouldn't have even considered reusing it. Cleaning up a cylinder is basically restoring it to its previous condition. Sanding down a piston doesn't fix it because part of it is missing. Just because it runs doesn't mean it's "ok". Get another piston.