The most expensive part in this assembly is the Arm,rear Swing.
Parts such as the Rear Swinging Arm: Pin 20x20, No Product Description Available, Bearing(17x40x13.25), Bolt are included in the Gv1200glg Madura 1986 (g) Usa (e03) Rear Swinging Arm parts fiche.
The Pin 20x20 is the lowest priced item on this Rear Swinging Arm schematic.