Took the swingarm and suspension off to replace the chain (endless), lube the linkages and replace the shock.
Also checked front sprocket alignment with the rear as I was a bit concerned about the wear rate on the inside edge of the sprocket… turned out to be spot on, so I guess the chain itself was the issue. Maybe not surprising since it’s done 54,000 miles.
Sadly, ran out of daylight thanks to the time it took to get things clean so will have to complete the job tomorrow.