This Rear Fork - Chain Case diagram displays the required parts for the Cbx1000 Supersport 1980 (a) European Direct Sales Rear Fork - Chain Case.
In this schematic the "Bush, Rubber" is used most often.
A sample from the products for the Rear Fork - Chain Case include: Brg A Rr Fork, Stopper,adjuster, Drive Chain Set, Washer Plain 16mm.