That looks like an aftermarket sissybar, and the luggage rack appears to be the Cyrano de Bergerac edition. It appears functional. You know, the load rating for the OEM rack is something like 8 lbs.
Yesterday, I realized some noise in the front area, like when the head stem bearing has some play.
I saw this:
But should be like this:
I can imagine (will check today) that there is not enough preload on the springs, so when I pull the front brake and move the bike back and forth, that this noise comes from there.
Btw, 4 should be standard setting, for me it is '6'.