Some items from this specific schematic: Nut,radiator Fan, Bolt, Guard,oil Cooler, Spacer(6.5x10x12).
fifteen components are shown in this Gsx1300r Hayabusa 2009 (k9) Usa (e03) Oil Cooler exploded diagram.
On this parts fiche the O Ring(d:2.4,id:16) is the most specified component.