The component with the lowest price in the FRONT FORK (ST1100/ST1100AS) schematic is the Bolt,hex.,6x8.
Some items from this specific schematic: Screw Wash 5x20, Collar,fr Caliper, Bolt,fr,fork, Collar Piston.
Of all the components used in this assembly the Fork Assy,r *nh1* is the most expensive.