Engine; Timing System - Ducati ST3 Owner's Manual

Engine

Twin cylinder, four-stroke, 90° "L" type, longitudinal.
Bore, mm:
94.
Stroke, mm:
71.5.
Total displacement, cu. cm:
992.
Compression ratio:
E 11.3±0.5:1
Max. power at crankshaft (95/1/EC):
75 kW – 102 HP at 8.750 rpm
Max torque at crankshaft (95/1/EC):
93 kW (9.5 kgm) at 7250 rpm.
Max. rotation speed
9,500 rpm.
Important
Do not exceed specified rotation speed limits under
any running condition.

Timing system

Desmodromic (type) with three valves per cylinder,
operated by six rockers (3 opening rockers and 2 closing
rockers) and one overhead camshaft. It is operated by the
crankshaft through spur gears, belt rollers and toothed
belts.
96
Desmodromic timing system (fig. 97)
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.
7
1
5
2
3
4
6
3
4
2
4
5
8
2
6
8
fig. 97