The O-ring,21.5x1.5 is the lowest priced item on this Rear Cushion schematic.
Some items from this specific schematic: Conn Rod Sub Assy, Bolt,lnk,12x96, Spring,rr Cushion, Ring,stopper.
With all the components that make up the CR125R 2001 (1) AUSTRALIA REAR CUSHION assembly. The Collar,link Side is the most frequently specified with six applications.