67
E
Engine
Twin cylinder, four-stroke, 90° “L" type, longitudinal.
Bore, mm:
70,5
Stroke, mm:
51
Total displacement cu. cm:
398
Compression ratio:
10±0.5:1
Max. power at crankshaft (95/1/EC):
32 kW (44 HP) at 11,000 rpm
for derated version 25 kW (34 HP) at 11,000 rpm.
Max torque at crankshaft (95/1/EC):
31.5 Nm (3.2 Kgm) at 8,750 rpm
for derated version 29 kW (3.0 Kgm) at 6,250 rpm.
Timing system
Desmodromic (type) with two valves per cylinder, operated
by four rockers (2 opening rockers and 2 closing rockers) and
one overhead camshaft. It is operated by the crankshaft
through spur gears, belt rollers and toothed belts.
Desmodromic timing system (
fig. 57)
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. 57
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