Parts such as the Crank Case: Ybs66-6 Washer, Plain, Head, Cylinder 1, Ybs66-8 Washer, Plain, Bolt, Hexagon (654) are included in the R3 1969 Usa Crank Case parts fiche.
The lowest price component in this Crank Case parts-list fiche is the Ybs66-6 Washer, Plain.
This CRANK CASE assembly utilises twelve Ybs66-8 Washer, Plain(s) - the highest specified component.