In this schematic the "Screw,cross 6x35" is used most often.
Parts such as the Left Crankcase Cover / Alternator: Breaker,contact, Felt, Oil, Gasket,l.cover, Cover,l.crankcase are included in the Xr80 1979 (z) Usa Left Crankcase Cover / Alternator parts fiche.
The Screw Cross 6x16 is the lowest priced item on this Left Crankcase Cover / Alternator schematic.