So... did you have success with this?
Originally Posted by ChRR1000S
I did some research and found a lead to something that could fix it:
In a german Z-forum (zroadster.com) I found a thread about the same issue!
One of the ways to get rid of it they say is getting the rear stabilizers replaced, but before that they may should check the pre-stress- tension on the stabilizers.
I ll drop mine off next week lets see if they can fix it.