Parts such as the Speedometer (model L): Screw, Plate,setting, Knob,trip, Clamp are included in the Gsxr750 1989 (k) Usa (e03) Speedometer (model L) parts fiche.
Check out any of the thirty Speedometer (model L) components enlisted.
The component with the lowest price in the SPEEDOMETER (MODEL L) schematic is the Screw.