Seems like the power figures were released during the pre EICMA announcements:
Like the Honda CBR500R & Honda CB500F, the Honda CB500X uses the same modest liquid-cooled, fuel-injected, DOHC, 180° crank, parallel-twin motor that will put down 54hp at the wheel for the US market (tiered-license countries will see a 47hp machine).
http://www.asphaltandrubber.com/bike...0x/#more-37111