Some items from this specific schematic: Cushion, Bolt,oil Fille, Hose(3x5x600), O Ring(d:2.4,id:11.8).
The O Ring(d:2.4,id:11.8) is the most widely applied product in the GSX1300RZ HAYABUSA 2001 (K1) USA (E03) OIL COOLER ( four times ).
The component with the lowest price in the OIL COOLER schematic is the Spacer(6.5x10x10).