Either of the single disk master cylinders will work with the Honda caliper. Just don't use the 11/16 unit it's too much for a single disk set up. If memory serves me correct, I used the 9/16 with no issues, just keep in mind that they may reguire DOT5 brake fluid, requiring a complete and through cleaning of the Honda unit before switching fluids,I would also recommend replacing the caliper seal too.