Ducati MONSTER S4, Owner'S Manual

Page: 119 / 273

55
E
Engine
Twin cylinder, four-stroke, 90° “L” type, longitudinal.
Bore mm:
94.
Stroke mm:
68.
Total displacement cu.cm.:
916.
Compression ratio:
11±0.5:1.
Max. power at crankshaft (95/1/CE):
74 kW - 101 HP at 8750 rpm.
Max torque at crankshaft (95/1/CE):
92 Nm at 7000 rpm.
Important
Do not exceed specified speed limits (see page 56)
under any running condition.
Timing system
Desmodromic with four valves per cylinder, operated by
eight rockers (4 opening rockers and 4 closing rockers)
and two overhead camshafts. It is operated by the
crankshaft through spur gears, belt rollers and toothed
belts.
7
6
6
8
2
1
5
1
3
4
Desmodromic timing system (fig. 44)
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.
fig. 44
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