Engine; Timing System - Ducati SPORTTOURING ST4s 2005 Manuel D'utilisation Et Entretien

Engine

Twin cylinder, four-stroke, 90° "L" type, longitudinal.
Bore, mm:
98
Stroke, mm:
66
Total displacement, cu. cm:
996
Compression ratio:
E 11.5±0.5:1
Max. power at crankshaft (95/1/EC):
86 kW – 117 HP at 8,750 rpm
Max torque at crankshaft (95/1/EC):
10 Kgm at 7,000 rpm
Maximum rpm, rpm:
10.000
Important
Do not exceed specified rotation speed limits under
any running condition.

Timing system

Desmodromic (type) 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.
94
Desmodromic timing system (fig. 96)
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
3
8
2
1
6
5
fig. 96