Mike,
99% of the time a new slave, fluid and braided line will fix the issue on a DE. (About 1 hrs work)
You can inspect the fork etc if you remove the rubber "grommet" around the fork on the side of the gearbox.
If your clutch is working again after pulling the pedal up then it wont be the fork or ball pin.
At 104k it is probably time for a new clutch and fly anyway, however this is not your current issue.
Alex.