I purchased this for a 2017 Kawasaki Z650 because the passenger seat is so small and narrow at the rear that I could not mount any type of tail bag using straps under the seat. Also I have the OEM side bags which eliminate the option of a traditional top case mount above and behind the rear fender. I wanted something that would look integrated with the bike, and I think this concept is brilliant - but the design is flawed. 1st this is extremely expensive compared to other options. It is clever so that deserves a premium, but when you pay a lot more you expect it to sort of work without major efforts and modification. H&B did not include functionality in there design plans. On my bike the rack sits about 1-1.5 inches above the rear tail section of the bike, H&B provided a 1/2" expandable foam strip to seal that gap. You will have to engineer your own seal if you think keeping the elements out from under the seat as Kawasaki intended is important - and yes H&B designed this specifically to fit my bike. The mount is abysmal, it is secured only by the seat lock and one loose fitting tab. These are 180 degrees apart and there is nothing to stop side to side rocking other than the lock. The stress on the lock will be orders of magnitude beyond what Kawasaki intended and when it goes so goes the rack and whatever you attached. And then you will need to buy a new lock from Kawasaki, just to put the old seat back. I cannot see how this item is usable in any way, but I am out more than a few bucks and am trying hard to find a way. If I find a way I will update, but my recommendation is stay away.