Drive clutch Big play on shaft?

[Motorhead]

Looked on yamahapartshouse phish and it does not show a spline.

Ok shall check out post #12.

I worked at a Cat dealer in the 70s, yeah I'm getting old, but anyways cat had a hexagon shaft primary clutch on their kawasakis motors back then. They would wear out very quick and also rattle. Problem was they would turn into bombs after a couple of seasons. Cracking and flying apart was a concern back then.

We checked free play just like what you see in video, but with measurement equipment because if too much they were replaced before something bad happened!