The lowest price component in this Crankcase Cover parts-list fiche is the Bolt (6x35).
Parts such as the Crankcase Cover: Bolt (6x40), Pin, Bolt (6x35), Cover,starter Motor are included in the Gs450l 1987 (h) Usa (e03) Crankcase Cover parts fiche.
In this schematic the "Bolt (6x35)" is used most often.