knock in forks

[drewboid]

Might have been obvious to you but I have to ask - did you check the steering head bearings?
If they get a little loose they can "click" as they unload.
With the bike on the centerstand and the front end off the ground try pulling the forks forward - there should be no movement.
When I bought my 1984 the front end was very notchy - replacing the bearings cured the problem.
YMMV