Parts such as the Taillight: Gasket, Tail Lens (nas), Screw, Tapping, Grommet, Collar(42g) are included in the Wr400f 2001 5gs9 Sweden 115ng-100e1 Taillight parts fiche.
This TAILLIGHT assembly utilises three Collar(42g)(s) - the highest specified component.
The Bulb, Taillight (12v 21/5w) is the lowest priced item on this Taillight schematic.