Some items from this specific schematic: Bolt,socket,6x30, Pin,dowel,4x14.8, Bearing-ball,#6004c3, Bearing-ball,#6905.
The Gear Change Drum & Forks (km100- assembly is constructed from several parts from which the Drum-assy-change is the most expensive.
The lowest price component in this Gear Change Drum & Forks (km100- parts-list fiche is the Washer-plain-small,6m.