Just got back from my Tassie trip on the Tiger and noticed oil on the rear wheel of the Vulcan. Right side shock has been leaking.
So I took them off and sent them back to Racetech for a rebuild, they have done 40k.
While I was at it I took the rear wheel off to replace the disc and rebuild the caliper as the disc was down to its wear limit and was on the schedule to do anyway. The leaking shock has made me do it sooner, so probably for the better.