Parts such as the Tachometer Gear: Axle, Drive Gear, Housing, Tachometer Gear, Gear, Driven, Bolt, Hexagon Socke are included in the Tzr50 2005 5wxf Switzerland 1d5wx-361ea Tachometer Gear parts fiche.
The lowest price component in this Tachometer Gear parts-list fiche is the Arandela Plana.
In this schematic the "Arandela Plana" is used most often.