Ducati Monster 821 Owner's Manual page 145

Entering the code (A):
1) Press button (2) or (1), only one digit indicating "0"
starts flashing;
2) Each time you press the button (2) the displayed
number increases by one (+ 1) up to "9" and then
starts back from "0";
3) Each time you press the button (1) the displayed
number decreases by one (- 1) up to "1" and then
starts back from "0";
4) To confirm the number, press the button (4);
Repeat the procedures until you confirm all the digits
of the PIN CODE.
144
1
2
1
4
2
km/h
°C
4
4
4
4
Fig. 73