Ducati DUCATI999 - Engine; Desmodromic timing system

79
E
6
1 2 3
7
5 4
fig. 79
Engine
Twin cylinder, four-stroke, 90° “L” type, longitudinal.
Bore:
100 mm
Stroke:
63.5 mm
Total displacement:
998 cu.cm.
Compression ratio:
1:11.4±0.5
Max. power at crankshaft (95/1/EC):
91 kW - 124 HP at 9500 rpm
Max torque at crankshaft (95/1/EC):
102 Nm at 8000 rpm
Max. rotation speed:
11500 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 rocker arms (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. 79)
1) Opening (or upper) rocker.
2) Opening rocker shim.
3) Closing (or lower) rocker shim.
4) Return spring for lower rocker.
5) Closing (or lower) rocker.
6) Camshaft.
7) Valve.