Ducati MULTISTRADA 620 Manuel D'utilisation Et Entretien page 174

Engine
90 degree twin cylinder four stroke, 618 cc, Desmodromic
valve gear, electronic fuel injection, air cooled.
Bore:
80
Stroke:
61,5
3
Total displacement cm :
618
Compression ratio:
10,5:1
Max power at crankshaft (95/1/EC), kW/CV:
45 kW (61 HP) at 8500 rpm
Restricted power version 24.5 kW (33 HP) at 8500 rpm
Max torque at crankshaft (95/1/EC):
55 Nm - 5.6 kgm at 6500 rpm
Restricted power version 46 Nm - 4.7 kgm at 4000 rpm
Important
Do not exceed specified rpm limits in any running
condition.
Timing system
Desmodromic with two valves per cylinder, operated by
four rocker arms (two opening rockers and two closing
rockers) and one overhead camshaft. It is operated by the
crankshaft through spur gears, belt rollers and toothed belts.
Desmodromic timing system (fig. 75)
1) Opening (or upper) rocker;
2) opening rocker shim;
3) split rings
4) closing (or lower) rocker shim;
5) return spring for lower rocker;
6) closing (or lower) rocker;
7) camshaft;
8) valve.
E
fig. 75
81