Oops sorry guys made a typo mistake last nite, they are bushes not bearings
Heaven number 7 rider Robbo and i had this same conversation
at last years vintage mr mx meet at raymond terrace where we were talking
about all the hard to get parts for our 84 cr500s.
He had the same problem with his linkage bushes (all worn out)
Told me he used 81 CR450 honda linkage bushes ..
Seemed to work ok for him finished 5th overall last year in SA aussie titles.