The seventeen Yw100e 2001 4vpj Portugal 114vp-300s1 Oil Pump component parts are all listed in this schematic.
The lowest price component in this Oil Pump parts-list fiche is the Gasket, Breather Bolt (nas).
Parts such as the Oil Pump: Spring, Compression, Gear, Worm Wheel, Clamp, Circlip(1ey) are included in the Yw100e 2001 4vpj Portugal 114vp-300s1 Oil Pump parts fiche.