Yamaha PW SYSTEM Manual page 46

To main riding display.
 DistanceUnit (Distance Unit)
You can select the unit for distance and speed.
When "km" is selected, the traveled distance will be indi-
cated in kilometers and the speed in km/h.
When "mile" is selected, the traveled distance will be indi-
cated in miles and the speed in mph.
1. Select "km" or "mile" by using the assist mode switches
(up) or (down).
2. When you press the function select switch, the setting
will then be kept and the display will return to the main
riding display.
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Selection of "km" or "mile"
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