Some items from this specific schematic: Battery Assy., Grommet A,cleaner, Collar,6.3x13, Battery (yb14l-a2.
On this parts fiche the Collar,6.3x13 is the most specified component.
The Cb750c 750 Custom 1981 (b) Usa Battery consists of twenty-one pieces with the Box Comp.,battery being the most expensive.