The sub assemblies and components that make up this Front Balancer include this Hldr, Balancer Shaft, the most expensive part.
eighteen components are shown in this Cb250rs 1980 (a) Sweden Front Balancer exploded diagram.
Some items from this specific schematic: Washer (22x8.5x2), Slipper,chain, Shaft,balancer, Spg,chain Adjust.