crankshaft gear issue

it has slop in the gear bore and slop in the turning of the keyway and I know no matter how tight I get the balancer at some point that will be a harmonics issue. Thanks for the reply
my question was if both the new sprocket and old sprocket were equally as sloppy then it may be the crank that's out of spec.

either way, it should be fairly snug fit on there.