Ducati Monster620 - Engine; Timing System

65
E
Engine
Twin cylinder, four-stroke, 90° “L” type, longitudinal.
Bore:
80 mm (620)
88 mm (800)
94 mm (1000)
Stroke:
61.5 mm (620)
66 mm (800)
71.5 mm (1000)
Total displacement:
618 cu.cm (620)
803 cu.cm (800)
992 cu.cm (1000)
Compression ratio:
10.5 ±0.5:1 (620)
10.4±0.5:1 (800)
10.1±0.5:1 (1000)
Max. power at crankshaft (95/1/EC):
44.3 kW - 60 HP at 9500 rpm (620).
54 kW - 73 HP at 8250 rpm (800).
62 kW - 84 HP at 8500 rpm (1000).
Max torque at crankshaft (95/1/EC):
53 Nm at 6750 rpm (620)
69 Nm - 7.0 Kgm at 6500 rpm (800)
84 Nm - 8.5 Kgm at 6000 rpm (1000)
Important
Do not exceed specified speed limits (see page 66)
under any running condition.
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2
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6
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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.
fig. 55
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