The twenty-six Cx500c Custom 1979 (z) Usa Crankshaft / Piston component parts are all listed in this schematic.
Some items from this specific schematic: Conrod.assy., Brg.f,conn.rod*pink, Brg D,cnrod*green, Ring,piston (std).
The component with the lowest price in the CRANKSHAFT / PISTON schematic is the Clip,pistonpin 21.