The component with the lowest price in the REAR BRAKE HOSE schematic is the Washer(10x15x1.5).
This part-list fiche shows all the components that make up the Gsx1100es 1984 (e) (e01 E06 E17 E24 E39) Rear Brake Hose .
The Rear Brake Hose is made up of components including this Hose,rear Brake which is the most expensive.