Yamaha PW SYSTEM Manual page 48

To main riding display.
 RecordReset (Record Reset)
You can reset the "TripDist" (Trip meter), "Ave" (Average
bicycle speed), "Max" (Maximum bicycle speed), and
"TripTime" (Trip time) values.
TIP
You cannot reset the odometer.
1. Select an item by using the assist mode switches (up)
or (down) and use the function select switch to place a
check mark in the check box for the item that you want
to reset.
2. When you select "OK" and press the function select
switch, the items with check marks will be reset and the
display will return to the main riding display.
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Items with check marks will be reset
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