Parts such as the Taillight(s): Lamp-tail, Bolt,socket,5x16, Collar are included in the Klx450aef 2014 Europe Taillight(s) parts fiche.
The three Klx450aef 2014 Europe Taillight(s) component parts are all listed in this schematic.
The component with the lowest price in the TAILLIGHT(S) schematic is the Bolt,socket,5x16.