Proper Cam Roller ?

[tsubaki]

I can't remember which engine it was on but the same roller was a 2 piece composition and the outside portion had degraded but not completely fell off.
I'm suspicious that yours may have done the same thing and appears intact but smaller in appearance. The new ones may be one piece.

[Joker2]

Yes that is what I believe also, my old one looked skinnier and white, all cracked and missing pieces, there appears to be an o ring on the top of the post I guess I'll try and remove it then reinstall it