The sub assemblies and components that make up this Swingarm include this Arm-comp-swing, the most expensive part.
The six Z550g4 Gt550 1987 United Kingdom Fg Swingarm component parts are all listed in this schematic.
Some items from this specific schematic: Shaft-swing Arm, Collar,17x26x4.5, Oil Seal,26406, Bearing,r,4t30203e1.