Ducati MONSTERS4R Manuel De L'utilisateur page 141

Engine
Twin cylinder, four-stroke, 90° "L" type, longitudinal.
Bore mm:
94.
Stroke mm:
66.
Total displacement cu.cm.:
996.
Compression ratio:
E
11.6±0.5:1.
Max. power at crankshaft (95/1/EC):
83.4 kW - 113 HP at 8750 rpm.
Max torque at crankshaft (95/1/EC):
95.5 Nm (9.68 Kgm) at 7000 rpm.
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.
66
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Desmodromic timing system (fig. 67)
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
7
6
4
8 3
1 5
2
6
fig. 67