vivivivivibration

nm9stheham said
Please don't think I am gratuitously being a wet blanket, but all that is known that is balanced for sure are the external parts that have been re-balanced. Nothing conclusive is known about the internal parts, regardless of the pistons being nominally stock replacement weights.
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Shoot my mistake I didn't read closely, I thought he was saying the whole engine was balanced with the external parts added. In which case I agree, the balancing of the engine itself internally could (probably is) still be off.