Parts such as the Cylinder Head (nps508/9): Plug,spark(cr8eh9, Guide,in Valve (o, Joint Comp,inject, Injector Assy,fue are included in the Nps50 Zoomer 2008 (8) Korea / Dx Cylinder Head (nps508/9) parts fiche.
On this parts fiche the Bolt,flange 6x119 is the most specified component.
The thirty Nps50 Zoomer 2008 (8) Korea / Dx Cylinder Head (nps508/9) component parts are all listed in this schematic.