MV Agusta 800 Dragster Manual De Instrucciones página 145

Now, press "OK" for over three seconds to delete
the value. Otherwise, press "SET" for less than three
seconds to stop the deletion procedure.
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Subsequently, by pressing the flashing high beam
headlight key followed by the "OK" key for more than
three seconds, all the previously acquired times can
be cancelled.
Once all the data have been cancelled, press the
"SET" key to return to the "SINGLE LAP RESET"
mode and then to the following mode.
OPERATION
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