Hi,My bike is still at the dealer's -- an issue arose during removal of one of the ball joints. More to come.
I have friend who has the opportunity to make several test with two bikes, GT (from he's friend) and he's GTL, were has same movement problems on high speed driving.
Is donig several testings now, but the frist one is impresive:
He has put on GTL the GT windsecreen and rear top-box, and result is the GTL becomes solid as a rock... with ot with out panniers, same as GT, even he set the confort suspension and one passenger, and really illegal speeds...(235km/h) 146 miles, right?
It sounds like the problem is not on the body frame or duolever system.
He will do more test's, I will keep you informed.