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

Engine

Twin cylinder, four-stroke, 90° "L" type, longitudinal.
Bore, mm:
80
Stroke, mm:
61.5
Total displacement cu. cm:
618
Compression ratio
±0.5:1:
E
10.5
Max. power at crankshaft (95/1/EC):
47.3 kW - 64 HP at 9,500 rpm
Max torque at crankshaft (95/1/EC):
53 Nm at 6,750 rpm
60

Timing system

Desmodromic (type) with two valves per cylinder,
operated by four rockers (2 opening rockers and 2 closing
rockers) and one overhead camshaft. It is operated by the
crankshaft through spur gears, belt rollers and toothed
belts.
Desmodromic timing system (fig. 57)
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. 57