The most reasonably priced component used on the Kz750e1 1980 Usa Canada Taillight ('81 -'82 Kz750-e2/e3) is the Washer,6.5x20x1.6.
fifteen components are shown in this Kz750e1 1980 Usa Canada Taillight ('81 -'82 Kz750-e2/e3) exploded diagram.
In this schematic the "Washer,6.5x20x1.6" is used most often.