I did a weigh-in today.
Fully fueled and all fluids topped up.
My 2018 F850GS came in at 254kg (560lbs)
Major additions to the bike:
Motortek luggage rack without the rotopack plates
Mounting bar and phone holder behind windscreen (AliExpress)
Barkbusters + wind deflectors
Additional foot platforms
Brake pedal enlargement
Ram mount rear view mirrors (the coffin shaped ones with large extenders)
Mitas E07 tires (pair)
I've added a tire repair kit (the plug kind).
The bike itself has ESA and quickshifter (probably additional accessories give it a bit more weight compared to bone stock)