I would certainly get it looked at, a friend of mine had one break on him and it locked the rear wheel at 70 mph almost causing an accident. I cannot recommed anybody in the US to get it rebuilt but had mine done by Motorworks in the UK and it has done 10,000 miles since then, I will take it out soon and see how it is doing.
If it's in the Touratech catalogue then you don't need it
"You've got to think for yourselves! You're all individuals!"-Brian of Nazareth