In this schematic the "Screw, Pan Head" is used most often.
The Ball is the cheapest item from this partsfiche.
Parts such as the Oil Pump: Oil Seal (10x22x7-137), Gear, Drive, Nozzle, Washer,spring are included in the Ty125 1989 3su1 France 293su-351f1 Oil Pump parts fiche.