Looks like Pox
Gavo is right, it's the dreaded Box Pox, or to give it it's latin/medical name, "poxus pannieritus".
Just park your bike well away from other STs StinkyPete, take two asprin, and wait until the great Moto Adelaide do the transplant.
I've got to add, well done Moto Adelaide. I'm just sorry I can't take my bike in for it's service there, but even the most direct route (200 km inland and turn left!) makes it impractical.
