With all the dirt around the rear fender, the raised cap is a necessary addition to keep dirt out of the rear tank. Great idea and well designed part.
"Received the rear disc guard for my 890 R, and it is a quality piece of protection. Plus, it looks great on the bike! The instructions were simple—the hardest part was just taking the rear wheel on and off. I completely recommend this product."
Another excellent part from Perrun and Vanasche