Parts such as the Tires: Valve,tire, Tire,rr,130/90-16 67h, Balancer Wheel 20g, Balancer Wheel 30g are included in the Kz750k1 1983 Usa Canada / Ltd Belt Drive Tires parts fiche.
The Kawasaki TIRES has six products enlisted in the schematic.
With two applications this Valve,tire is the most specified part.