I recently went from a 2013 to a 2016 C14, and I noticed the windshield moves noticeably like it's wobbling when the bike hits bumps in the road. I don't recall the oem windshield or the GIVI replacement I had on the 2013 moved nearly as much as the windshield does on the 2016.
As far as I know, the windshield on the 2016 is oem, even though it doesn't have the word Kawasaki on it. It does have the vent (which I love) that was introduced in '15, so there might be more weight involved.
If someone says it's normal, guess I'll live with it. OTOH, if it's not normal, then how much bodywork has to be removed to check the windshield mounts? TIA