The instrument cups, or “binnacles” are important for correctly housing the instruments on the mounting brackets on the oil in frame models.
The binnacle is a rubber cup designed to house the speedometer and tachometer on the oil in frame models to 1979. Made in Taiwan.
The binnacle is fitted into a bracket that is fitted to the top yoke of the fork and retained by the fork top nut. There are holes for the cable and trip meter in the bottom of the binnacle.