Ducati 998R Manuel De L'utilisateur page 127

Engine
Twin cylinder, four-stroke, 90° "L" type, longitudinal.
Bore mm:
104
Stroke mm:
58,8
Total displacement c.c.:
999
Compression ratio:
1:12.3±0.5
Max. power at crankshaft (95/1/CE) kW/HP:
102/139 at 10,000 rpm
Max torque at crankshaft (95/1/CE):
105/10.7 Kgm at 8,000 rpm
Max. rotation speed
11,500 rpm.
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.
Desmodromic timing system (fig. 44)
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.
6
1
3
7
E
2
5
4
fig. 44
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