In this schematic the "Guide,valve (over" is used most often.
Of all the components used in this assembly the Head Assy,cylinde is the most expensive.
Parts such as the Cylinder Head: Bolt,flg.,6x45.5, Bolt,recessed,5x3, Nut,square,5mm, Insulator,throttl are included in the Cb1000r 2009 (9) European Direct Sales Cylinder Head parts fiche.