In this schematic the "Dowel,pin,8x14" is used most often.
Parts such as the Left Crankcase Cover/ Water Pump: Bolt,flange,6x25, Bolt,flange,6x12, Hose B,water, Bolt,flange,6x80 are included in the Vfr750r Rc30 1989 (k) England Left Crankcase Cover/ Water Pump parts fiche.
Of all the components used in this assembly the Cover,l.crankcase is the most expensive.