Engine; Timing System - Ducati Monster 620 Owner's Manual

Engine

Twin cylinder, four-stroke, 90° "L" type, longitudinal.
Bore mm:
80 (620); 88 (750); 92 (900).
Stroke mm:
61.5 (620); 61.5 (750); 68 (900).
Total displacement cu.cm.:
618 (620); 748 (750); 904 (900).
Compression ratio ±0.5:1:
E
10.7 (620); 9.1 (750); 9.2 (900).
Max. power at crankshaft (95/1/CE):
44.3 kW - 60 HP at 9500 rpm (620).
47 kW - 64 HP at 8750 rpm (750).
57 kW - 78 HP at 8000 rpm (900).
Max torque at crankshaft (95/1/CE):
53.3 Nm - 5.4 Kgm at 6750 rpm (620).
60 Nm - 6.1 Kgm at 6500 rpm (750).
73 Nm - 7.4 Kgm at 6250 rpm (900).
Important
Do not exceed specified speed limits (see page 61)
under any running condition.
60

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. 43)
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. 43