I feel a little tiny "click" in the handle bars when I am starting out from a stop.

I do not hear it, and I can't reproduce it in the shop? I have 70K on the odometer. No noticeable issues while driving.
My guess is the bearings in the steering head? Is this a difficult fix?
I had the front wheel off for a tire change, hoped to find something loose in the brakes, no apparent issues there. Not sure I would have known what to look for.

Any other suggestions?
Related item: I am at least the third owner. How can I tell what kind of fork springs are in there?
Should I just suck it up and rebuild the whole thing (springs, oil, bearings, ??) What kind of costs am I looking at and how difficult is this.