Engine; Timing System; Spark Plugs - Ducati 748R Manuel D'utilisation Et Entretien

Engine

Twin cylinder, four-stroke, 90° "L" type, longitudinal.
Bore mm:
88
Stroke mm:
61.5
Total displacement c.c.:
748
Compression ratio:
1:11.5±0.5
Max. power at crankshaft (95/1/CE) kW/HP:
78/106 at 11,000 rpm
Max torque at crankshaft (95/1/CE):
7.7 Kgm at 9,000 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. 45)
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.

Spark plugs

Make:
CHAMPION
Type:
A 55 V
1
7
6
4
8
2
1
6
3
5
fig. 45
E
59