Ducati Monster 796 Workshop Manual page 63

Maintenance operations
Once that all pistons of both callipers are fully moved back and that all the liquid in the tank has been aspirated, connect
to the bleed valve (5) a transparent tube by immersing the end in a container placed on the floor.
Fill the reservoir (2) with new brake fluid up to the MAX mark.
Operate the lever to reach the 20-30 mm end of stroke and keep the lever in this position by using a non-elastic clamp.
Loosen the bleed valve of the left calliper (from the rider view) (5) and then take the lever through the whole stroke to
allow fluid to escape.
The lever is supported to the grip.