Originally Posted by MortimerSickle
A little creative heat/quench work might do the trick if you knew what temps you needed, but it would probably be easier to just buy a new sprocket.
Mortimer; what was the time frame or usage that led to the pictured damage? Did it occur relatively quickly or over a longer time span or more usage? How were you able to confirm a harder sprocket as the culprit vs. a possible softer shaft (or even just a poor fit on the spline)? You may have already covered all this with Luke in different place, but you definitely have my attention on this concern. Thanks!