Jl: Your cam and bearings might be able to take another 50k miles of abuse in this condition - especially if it's well-lubricated from here on out.

They may sieze up tomorrow - especially if starved for oil again.

It's hard to tell - and usually people like to play it safe. If it does sieze, two things can happen: 1) The entire engine stops (best case scenario). 2) The timing chain snaps and flops around inside with the engine running. Valves kiss pistons on one or both sides of the engine. Massive top-end and possibly bottom-end damage.

You CAN just replace the bearings if the cam is in good condition - but if it was starved for oil for any extensive period of time, the soft towers' metal shavings would probably have ground away at some of the journal. Best way to tell is removing the suspect cam and examining it and its towers for scoring. How does the engine sound while running?

If you do need to replace the cam as well as the bearings, you CAN leave the old rockers on, but you're best off getting new ones to prevent the old worn ones from wearing the new cam faster.

__________________
Back in the saddle - 1972 280SE 4.5