Parts such as the Cylinder Head: Nut,square,5mm, Insulator,throttl, Bolt,flg.,6x39.5, Bolt,wash 9x90 are included in the Cb600f Hornet 2008 (8) France / Type 2 25k Cylinder Head parts fiche.
On this parts fiche the Guide,in Valve (o is the most specified component.
This Head Assy,cylinde is the most expensive of the items that make up this Cylinder Head assembly.