Engine; Timing System - Ducati Monster620 Owner's Manual

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.

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
65