KTL:
There is no bushing on the lash cap rockers. I'm not sure why not other than to save weight. There isn't room to bore larger for a bushing either.
Chris:
As for DLC, the only failure mode I've been told about (second hand) is bending of the item causing delamination. That said I have not yet called to chat tech with the coating company.
My Ti wrist pins are DLC coated so I assumed rocker shafts would be an appropriate use as well.
Do you have any other suggestions above the ringing endorsement
for the motorsports shafts?