Can't beleve you made it this long! Mine went at 15000 along with the cam bearings. Have you ever changed either? HD would have changed them out under a warranty but that is gone now. It's up to you but if they fail it could be bad.
Not an easy fix when this occurs .....The cheap INA brand inboard cam bearings fail prematurely
The bearing bore gets ruined as the cam bangs around in the empty bearing shell.
Everyone who does this work upgrades to the Torrington brand bearings.