Engine; Timing System - Ducati 749S Owner's Manual

Engine

Twin cylinder, four-stroke, 90° "L" type, longitudinal.
Bore mm:
90 (749/749S)
Stroke mm:
58,8 (749/749S)
Total displacement cu.cm.:
748 (749/749S)
Compression ratio:
1:11.7±0.5 (749)
1:12.3±0.5 (749S)
Max. power at crankshaft (95/1/EC):
76/103 at 10,000 rpm (749)
81/110 at 10,500 rpm (749S)
Max torque at crankshaft (95/1/EC):
77 Nm at 8500 rpm (749)
78 Nm at 8500 rpm (749S)
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.
WWW.PlandeGraissage.ORG
Desmodromic timing system (fig. 81)
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.
6
1 2 3
7
E
5 4
fig. 81
81