Depends on intended application. My list:
Nav 5
Crash bars [ top and bottom]
Bash plate
Wide pegs
Headlight protector
I tend to agree with these essentials .....
When buying a bash plate go for SW Motech ... It has far better protection than the standard one.
I am also a big fan of proper Pod Covers .... Also SW Motech ...? It can save your trip ....
And on the Adventure I would recommend the Chrash Bar Supports by Touratech. I have personal knowledge of one Chrash where these would have prevented serious damage ......


O, Ja .... The side stand switch is a bit exposed ..... There is a nice little protection plate for it.