Although there wasn't much wrong with the rear of the bike, apart from the tired shock absorber, I wanted to replace any worn needle roller bearings in the swingarm and linkages. While the swingarm was out, I could also repaint it because of a few scratches.
With the bearings all ordered, replacement was pretty straightforward. I replaced the two main swingarm bearings too because I could feel the tiniest amount of play in there. This was exactly the same afterwards though, so I guess a tiny bit is normal.
Bearings were removed with hammer and punch when necessary, and using sockets with 12mm threaded bar. They were all pulled back in with the threaded bar, sockets and large washers. Here's the finished linkage.
Scratches were flatted out with 400 then 800 grit paper and etch primer applied to the bare aluminium. Next it was primed, and finally painted with satin black. It came out well considering the chain was still wrapped around it!
The shock, although in need of a freshen up, was going back in. Maybe a rebuild in the future.
A lack of pics doesn't help, but the job was relatively simple and the swingarm pivot tool is definitely needed to avoid damage to the swingarm spindle nut.