The component with the lowest price in the STEERING STEM schematic is the Ball.
Of all the components used in this assembly the Stem,steering is the most expensive.
Parts such as the Steering Stem: Bracket,headlamp,left, Washer, Bolt 10x40, Head,steering Stem are included in the Gs400e 1978 (c) (e01 E02 E04 E17 E18 E21 E22 E24 E25 E30 E34 E39 Steering Stem parts fiche.