Parts such as the Battery: Grommet A,cleaner, Box Comp.,battery, Batteryr Assy., Bolt,slotted 6x12 are included in the Cb900f 900 Super Sport 1981 (b) Usa Battery parts fiche.
On this parts fiche the Collar,6.3x13 is the most specified component.
The most reasonably priced component used on the Cb900f 900 Super Sport 1981 (b) Usa Battery is the Bolt,slotted 6x12.