Help: Tightening Headset

In a similar vein, my headset keeps loosening itself. Even if I tighten it up properly with a proper headset spanner etc, after a few days I'll be there at the traffic lights tightening it up by hand again to get me home.

WTF? To be fair, it is (quite a bit) older than me. When a threaded heasdset gets worn out is this what happens?

This is not what happens when it gets worn.

I suspect that either you are not locking the two screwed parts together correctly or are perhaps missing the tabbed washer!

Hold adjustable race from moving and tighten locknut fully. Check again for play, rotating fork and checking different positions.

Please look at the link previously posted.