Some items from this specific schematic: Pad,4x17x5, Damper, Lamp-tail,led, Damper.
On this parts fiche the Screw,taptite,5x16 is the most specified component.
The most reasonably priced component used on the Zr900cjfb Z900rs 2018 Europe,middle East,africa,uk Taillight(s) is the Pad,7x12x5.