Originally Posted by badger1

If that is the bike you have, it has Future Shock, and therefore there is no obvious way of removing play in the headset bearings as would be the case with an ordinary threadless headset. There is still a compression ring, but the bearing preload is applied through a collar/some small screws (bolts) rather than through the top cap bolt.

There are quite a few good Youtube videos on this process: here's one example.
https://www.youtube.com/watch?v=y8uYn-MstvI