Thanks for the reply, I thought I had read it here but maybe it was a change to tapered rollers related post but the means to adjust clearance on the early bike having cup and ball makes sense though. (It would make going to a taper bearing easy over the later bikes) That being the reason I (mistakenly) regarded going from a tapered roller as a step backward (but is not the case as there was no taper as standard so clear on that now) Baz. A lot of newer bikes do have a cup and ball (Toyo) type steering head bearing but the balls have a plastic cage so are a little more upmarket. I do know Suzuki use those on many models but those that might see a higher load (DR650SE for one) have tapered rollers as stock. Before installing tapered rollers in the 850 I had looked at the Toyo caged cup and ball but the size availability did not suit the Norton needed dimensions (either way to big or way to small) but would have gone that route if something had been available as the first option. The outer makes them almost angular contacts.