So, out of curiosity, and since I dug out my calipers, I went ahead and measured the stock 50 tooth rear sprocket and the JT sprocket. Same thickness. The only thing I can assume is that either one or more studs were not seated in the channel when tightened, causing a gap to allow the play. The nuts were plenty tight when I went to remove it, so they were not loose and the Snap ring was fully seated as well. It is a mystery to be sure.
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