Parts such as the Meters: Speedometer Assembly,mph, Collar,5.6x8x13.8, Bracket,speedometer, Nut-hex,5mm are included in the Kz650f1 1980 Usa Canada Meters parts fiche.
Of all the components that make up this Meters the Nut-hex,5mm has the lowest price.
On this parts fiche the Bulb 12v 3w is the most specified component.