On this parts fiche the Bolt,socket,5x25 is the most specified component.
The Generator/regulator ('79-'80 B3/ is made up of components including this Rotor which is the most expensive.
Parts such as the Generator/regulator ('79-'80 B3/: Clamp,generator Lead, Bolt-upset,6x25, Washer-spring,6mm, Rotor are included in the Kz1000b4 Ltd 1980 Usa Canada Generator/regulator ('79-'80 B3/ parts fiche.