Engine; Timing System - Ducati MH900 EVOLUZIONE Owner's Manual

Engine

Twin cylinder, four-stroke, 90° "L" type, longitudinal.
Bore mm:
92.
Stroke mm:
68.
Total displacement cu. cm.:
904.
Compression ratio ±0.5:1:
9.2.
Max. power at crankshaft (95/1/CE):
55 kW – 75 HP at 8000 rpm.
Max torque at crankshaft (95/1/CE):
76 Nm – 7.7 kgm at 6250 rpm.
Important
Do not exceed the specified speed limit (see page
54) under any running condition.

Timing system

Desmodromic (type) with two valves per cylinder,
operated by four rockers (two opening rockers and two
closing rockers) and an overhead camshaft. It is operated
by the crankshaft through spur gears, belt rollers and
toothed belts.
Desmodromic timing system (fig. 55)
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.
1
2
3
4
6
5
7 8
fig. 55
E
53