Bearings are way overrated, who needs em?Here is the head and camshaft that has no bearings on either end do i install them or leave it be. i have no idea why some xs650's caame with no bearings in 1981
In case you missed it, that's pure sarcasm.
Read and follow Jim's excellent top end how to, found in tech.
https://www.xs650.com/threads/xs650-top-end-buildup.52041/
I don't know the history of what you have there but all years and ALL Xs650 motors came with cam bearings.
Yellow grease pencil is a clue there have been fingers in that motor after the factory was finished with it.