The Pin(7x11x42) is the lowest priced item on this Starter Clutch schematic.
Parts such as the Starter Clutch: Bolt(14x21), Clutch Set,starter, Pin(7x11x42), Gear,starter Idle are included in the Gsxr750 1988 (j) (e04 E15 E18 E25 E34 E75 E76 E79) Starter Clutch parts fiche.