Ducati MONSTER 620 2002 Manuel D'utilisation page 133

Engine
Twin cylinder, four-stroke, 90° "L" type, longitudinal.
Bore:
80 mm.
Stroke:
61.5 mm.
Total displacement:
618 cu.cm.
Compression ratio:
10.5±0.5:1.
Max. power at crankshaft (95/1/EC):
44.3 kW - 60 HP at 9500 rpm.
Max torque at crankshaft (95/1/EC):
53 Nm 6750 rpm.
Important
Do not exceed specified speed limits (see page 62)
under any running condition.
Timing system
Desmodromic (type) with two valves per cylinder,
operated by four rocker arms (2 opening rockers and 2
closing rockers) and an overhead camshaft. It is operated
by the crankshaft through spur gears, belt rollers and
toothed belts.
Desmodromic timing system (fig. 55)
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.
1
2
3
4
6
5
7
8
fig. 55
E
61