Ducati Monster 796 Workshop Manual page 258

Diagnostic instruments
Position the crankshaft so that the piston of the horizontal cylinder is at TDC of its power stroke, using the whole tool.
This is achieved by aligning the timing mark (C) of the timing driveshaft pulley (13) with the reference notch (D) on the
clutch cover (T).
Measure the horizontal timing belt on the section (14) as described in the paragraph "Measuring timing belt tension".
Turn the crankshaft through 270° in the direction of rotation of the engine (so that the vertical cylinder is at TDC of the
power stroke) and repeat the procedure used for the horizontal cylinder, measuring the tension on section (15) of the
vertical cylinder timing belt.
Remove the belt tension sensor and disconnect the DDS diagnosis instrument from the motorcycle.
Refit all the removed parts in the reverse order to that in which they were removed.
Measuring timing belt tension
Switch on the DDS diagnosis instrument (16) tool part no. 97900.0215 as indicated in the paragraph "Tester power
supply".
Connect the power and diagnostics cable (Measurement Module) (17) tool part no. 97900.0222 to the measurement
module connector (F) on the DDS diagnosis instrument (16).