ST Gui
240Robert
While everything is easily accessible, what else should I do? I was thinking maybe spark plugs, but at 56K the bike still runs like new.
I'd look at the plugs but unless they should obvious wear I'd expect not to need replacing them.
A horn is can be an easy farkle if you haven't already added one. Quick and dirty (and reliable) is a FIAMM or similar horn to replace the stock horn. You might have to tweak the mounting bracket to get the plastic back on. It's otherwise PnP.
If you added a second horn or an electro-compressor horn you'd want heavier gauge wire and a relay to get the most out of your horns and preserve the horn button. If you've already done some horn mod then never mind.
There's also LED headlights and position lights if you haven't done them and are so inclined.