Parts such as the Speedometer: Cushion,speedomet, Socket Illum, Speedometer Assy, Oil Seal are included in the Z50j2 Monkey Japan Speedometer parts fiche.
The most reasonably priced component used on the Z50j2 Monkey Japan Speedometer is the Screw Washer 4x6.
The sub assemblies and components that make up this Speedometer include this Speedometer Assy, the most expensive part.