I'm nearly ready to replace my YS drive again, the #1 original chewed up quick, #2's taken a bit longer to chew up, 3rd time lucky? I tried a disk of emery cloth and it helped but it wasn't a permanent fix for me, but I didn't glue it in (didn't think of it at the time).

The next one I fit will either get some drive pins fitted or I will JB weld the spinner backplate to the drive disk.

I don't think the YS drive washer is up to the task.