Can you do that on a 1200GS with dual braking ? 
Of course you can!!!!! Before you do, though....read this:
I performed the same idiotic stuff on one of my previous bikes with a Combined Brake System. (Honda CBR 1100 xx Blackbird)
The result was flawless circle...the only problem (apart from the schredded rear tyre) was the total destruction of the Blackbird's braking systems. I had to travel from Christiana back to Paarl with only about 20% braking ability....trust me....that keeps you awake really well.
The whole Brake system had to be replaced (about R13000 in 1999).
So my short answer is: Sure, man.....rip it up..! Just talk to your bank manager beforehand...
