The most expensive part in this assembly is the Filter,rotary.
Some items from this specific schematic: Strainer, Oil, Plug, Straight Screw, Gear, Pump Driven, Gear, Pump Drive.
The Screw, Flat Fillister(22f) is the most widely applied product in the TTR90E 2004 5HNM IRELAND 1C5HN-100EB OIL PUMP ( two times ).