Some items from this specific schematic: Gasket,crankcase (mca), Screw Cross 6x45, Crankcase,r., Valve Comp.,reed.
The Bolt,stud 6x32 is the cheapest item from this partsfiche.
The Screw Cross 6x45 is the most widely applied product in the PA50MCVLS-D 1982 E-5 CRANKCASE - INLET PIPE ( five times ).