The O-ring,21.5x1.5 is the lowest priced item on this Rear Cushion schematic.
Parts such as the Rear Cushion: Cap,bladder, Conn Rod Sub Assy, Arm Sub Assy,cush, Dust Seal,25x32x4 are included in the Cr125r 2000 (y) Canada / Cmf Rear Cushion parts fiche.
With all the components that make up the CR125R 2000 (Y) CANADA / CMF REAR CUSHION assembly. The Collar,link Side is the most frequently specified with six applications.