Procross/Proclimb 800 brake disk cover.
This bolt on cover will keep water from being flung up from the brake disk onto your clutches. Without the cover snow can get pushed in around the brake disk then as it melts the disk will throw it up on the clutches before it will drain out below the disk. Once the water gets on the clutches the belt will slip. The slipping causes loss in performance, belt heat and can blow the belt.