Ducati DESMOSEDICI RR Owner's Manual page 25

When the LAP function is set to Off in the menu, the current
"lap" is not stored.
The LAP function is disabled automatically if the key is turned
to Off (Key-Off) while it is active and the current "lap" is not
stored even though the lap timer had been active before Key-
Off.
If the lap timer is not stopped, it will roll over upon reaching
99 minutes, 59 seconds and 99 hundredths; the lap timer
starts counting from 0 (zero) and will keep running until the
function is disabled.
If the LAP function is enabled without resetting the "memory"
and there are less than 30 laps stored in the memory (for
instance: 18 laps stored), the display will store new laps until
the memory is full (in this instance, 12 more laps).
This function only displays lap times; display of other
information stored (MAX speed, MAX RPM, limiter threshold
reached) is provided by the Lap Memory function.
press C
after 10 sec.
press C
after 10 sec.
E
fig. 19
25