The Kawasaki SEAT/SEAT COVER ('80 D3) has twenty-seven products enlisted in the schematic.
Some items from this specific schematic: Nut,6mm, Washer-plain-small,8m, Cover,seat Lock, Damper Rubber.
The most reasonably priced component used on the Kz1000d1 Z1r 1978 Canada Seat/seat Cover ('80 D3) is the Washer-spring,6mm.