Parts such as the Gear Shifting: Fork,gear Shift No.2, Body,gear Shift Switch, Guide,gear Shift Cam, Pin(4x15.8) are included in the Zr50slk 1981 (x) (e02 E21) Gear Shifting parts fiche.
With four applications this Pin(4x15.8) is the most specified part.
This schematic depicts all components used in the Zr50slk 1981 (x) (e02 E21) Gear Shifting partslist.