Closer inspection of the swing arm shaft shows some grooves worn into it, by the location I think it might be the outer seals, which had very little rubber left on them.
The bearings themselves do not look damaged, spin freely but admittedly didn't have much grease on them. With the shaft inserted there's no play on the bearings. I'm now wondering if I will have to replace the shaft and whether to attack the bearings or pack them with grease and see how they feel.
Edit, looking at the photos now on a big screen, it looks like the scores might be in line with where the swing arm clamps onto them? Any thoughts?
