Reading in the 91 distinction of the sandcast, there is a post of the adjuster having no holes like the newer adjusters have.
My question is when did the change happen?
I have one no hole adjuster that was on a K1 chopper frame and the other was with the holes.
I looked st the CMS parts fiche for the K0 and it references the holed adjusters, like on up to K8 have.