73
E
Engine
Longitudinal 90º “L” twin cylinder, four-stroke.
Bore (mm):
94
Stroke (mm):
71,5
Total displacement cm
3
:
992
Compression ratio 1:10±0.5
Max power at crankshaft (95/1/EC)
64 kW - 84 HP at 8,250 rpm
Max torque at crankshaft (95/1/EC):
86 Nm (8.5 kgm) at 6,250 rpm.
Timing system
Desmodromic
with two valves per cylinder, operated by four
rocker arms (two opening rockers and two closing rockers)
and one overhead camshaft. Driven by the crankshaft through
spur gears, timing belt pulleys and toothed timing belts.
Desmodromic timing system
(fig. 61)
1) Opening (or upper) rocker arm;
2) opening shim;
3) half rings;
4) closing (or lower) shim;
5) return spring for closing rocker;
6) closing (or lower) rocker arm;
7) camshaft;
8) valve.
1
2
3
4
6
5
7
8
fig. 61
