In this schematic the "Bolt,flange,7x55" is used most often.
Parts such as the Cylinder Head (front): Washer 5mm, Pin,dowel,9x14, Insulator,carbure, Bolt,flg.,6x45.5 are included in the Vfr750r Rc30 1989 (k) Germany Cylinder Head (front) parts fiche.
The most reasonably priced component used on the Vfr750r Rc30 1989 (k) Germany Cylinder Head (front) is the Screw Cross 5x8.