Honda Monkey 2021 Owner's Manual page 26

Instruments
Changing of speed and mileage unit
!a
Turn the ignition switch to the (On) position.
!b
Press and hold
!c
Press button to select either "km/h" and "km" or "mph" and "mile".
SEL
!d
Press button.
SET
The speed and mileage unit is set, and then the display returns to the ordinary display.
The speed and mileage unit can also be set by turning the ignition switch to the
u
22
(Continued)
button and
SEL SET
button.
(Off) position.