I'm pretty sure you have adjustable front forks on the 2012 F650 GS.
The F800 GS has upside down, non adjustable front forks. (What were they thinking?)
I like the diagrams for adjusting a bikes suspension, on pages 12 and 13 of this pdf. from Ohlins.
Having said all that:
I weigh too much for my suspension. (300+)
So, I am getting an upgrade from:
My Scotts steering damper took out my high speed wobbles.
That damper works really well. I like it very much.
It does raise my bars. I can't use some wind screens, like the Windshield - VStream Touring Windshield - by ZTechnik without hitting my mirrors on the sides. Even with the mirror extenders. (I bought one and returned it.)
Now, I just have a bottoming out, issue. And a few noises I need to dampen.
Someday, I will dial in, this bike.