Ducati MONSTER 821 Workshop Manual page 108

During this operation, oil level inside reservoir must remain at a visible level from the sight glass at all
times. The end of the transparent plastic hose must remain immersed in the discharged fluid at all times.
Operate brake lever and keep it activated during the whole filling operation.
Connect it to left-hand front brake calliper bleed valve (5).
Note
Follow the manufacturer's instructions when using a commercial brake bleeding tool.
Suck with the bleeding tool and open the bleed valve (5) making sure that the level of the concerned
reservoir does not fall below the sight glass.
Continue this operation until all air is bled out of system.
Tighten bleed valve (5) to a torque of 4 Nm ± 10%.
If you do not have a bleeding tool available, connect a transparent plastic tubing to the bleed valve (5) as
outlined in the draining procedure.
Operate the lever to half stroke or until system is pressurised, open bleed valve (5) and operate lever to
full stroke; tighten bleed valve to the specified torque and release lever.
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