Because those studs arent really meant to hold the sprocket on fully. They are there primarily for power transfer from the sprocket to the rear wheel. That said, they should serve a small function to retention, but the primary retainer is that snap ring. The end of the stud that goes into the bushings on the wheel should not have much play in them. Mine do, but I managed to get it to seat correctly. I finger tightened the studs to the sprocket to ensure the studs flats were fully in the channel on the back of the sprocket. Then I installed the sprocket on the wheel, put the snap ring back on, removed the nuts one at a time to loctite them and reinstalled each one before doing the next, and then tightened them down. This method took all of the play out of the sprocket. I plan to go back and check it after a couple of rides to see if it loosened up again, and probably install the honda studs as a matter of course aince they are likely much higher quality anyway.
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