Honda CMX500A 2019 Owner's Manual page 35

4 Changing of fuel mileage meter unit:
Press SEL button to select "km/L" or "L/
a
100km".
Press SET button. The fuel mileage meter
b
unit is set, and then the display moves to the
ordinary display.
The established setting can also be set by
turning the ignition switch to the
position.
The control is automatically switched from
the setting mode to the ordinary display if
the button is not pressed for about 30
seconds. Even in this case, established
setting is maintained.
(Off)
31