This fitting kit suits all later day 1.25" and 1.5" twin carb set ups where the balance rods between the carbs required are equal length (2.25"), some early carbs had the balance bar with a triangular plate that were a shorter length. The kit has the original type abutment bracket that fits to the inlet manifold to guide the accelerator…
For HS4 twin non waxstat carbs with red jet this is the full rebuild kit with the spindle and plain throttle disc and bushes--- see WZX1859 for service kit