RHS footpeg/rear brake lever hanger
Mileage: 4624
Mine keeps coming loose – alarmingly quicky, and a quick scan of the forums will reveal that most do. This is because Triumph forgot to put locking nuts on the bolts.
Couple of M6 nuts should do the trick.

The top bolt comes loose.

That should sort it. *Tip* Do this with the bike on the side-stand, not the centre-stand!