The most reasonably priced component used on the Nps50 Zoomer 2005 (5) England Mkh Oil Pump is the Screw Cross 3x10.
This schematic depicts all components used in the Nps50 Zoomer 2005 (5) England Mkh Oil Pump partslist.
Some items from this specific schematic: Gear,oil Pump Dri, Pin,dowel,6x10, Pump Assy,oil, Screw Cross 3x10.