They were out of stock of ducks guts.
In the end I just used what was readily available. Some red Nulon grease rated for -35 to- 100+ degrees with supossedly excellent water repelling qualities....
Given that steering head bearins are never going to be operating in high heat the main thing I looked for was water repelling quallities as I reckon water can get in behind the plastic in the holes without too much effort. Was actually thinking of using some tape to seal these holes.
Either way it is nice to know that yet another part of the bike is now up to speed. Does the rear swing arm have bearings and would they also be likely to need some greasy action whilst in the greasing type of mood?
Is it a relatively easy job like the steering bearings or major PIA?