I carry wet paper towels or rag in a zip-lok bag for wiping off my visor when it gets covered with bugs. A dry microfiber rag for drying. I also carry an air gauge.
And the charger for my cell phone.
I have not put all the miles some of you have on the XX, but other than losing a fairing bolt ( I had the side panel off when I changed the oil and evidently didn't tighten one of the bolts )
I've never had an issue, not so much as a burn't out bulb.
Oh, wait!!! Once, while heading to MIXXT the band that holds the tool kit down broke.