With six applications this Roller,4x12 is the most specified part.
Some items from this specific schematic: Bolt, Flanged, 6x35, Stopper-assy,reverse, Roller,4x6, Gear,reverse,22t&30t.
The lowest price component in this Gear Change Drum/shift Fork(s) parts-list fiche is the Bolt, Flanged, 6x35.