Having installed a similar unit on my former Honda CB1100 did you run through the installation process where the unit "learns" the gear positions? If the display is counting down, then it's not programmed yet.
Setup
You need to setup the module after installation. When ignition is turned on, the display counts backwards (6 to 1) indicating that the memory is clear.
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Raise the rear wheel off the ground by using a stand, and start the
engine in Neutral. (If you do not have a stand, you may setup the unit while riding. Find a long, straight road with light traffic).
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The display will blink “1”. Select first gear, release the clutch, and keep the RPM above idle speed. The display is blinking faster while the unit is learning the gear.
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When the display shows “2”, select second gear. Repeat this process until all gears are thought (5 or 6). If your bike has 5 gears, wait until “6” is blinking, then pull the clutch in and turn ignition off. If your bike has 6 gears, wait until “o” (over) is indicated. The unit is programmed and should indicate the gears correctly.
Now, when ignition is turned on, the display counts forward (1 to 6) indicating
that it is fully functional.
Aloha,
Huladog