The most reasonably priced component used on the Gb500 Touristtrophy 1989 (k) Usa California Speedometer / Tachometer is the Screw,oval,5x16.
The sub assemblies and components that make up this Speedometer / Tachometer include this Tachometer Assy., the most expensive part.
Some items from this specific schematic: O-ring B,6.8x1.9, Stay,side Stand W, Cushion,speedomet, Socket Comp.,side.