61
E
Engine
Twin cylinder, four-stroke, 90° “L” type, longitudinal.
Bore:
88 mm.
Stroke:
66 mm.
Total displacement:
803 cu.cm.
Compression ratio:
10.45±0.5:1.
Max. power at crankshaft (95/1/EC):
54 kW - 73 HP at 8250 rpm.
Max torque at crankshaft (95/1/EC):
69 Nm - 7,0 Kgm at 6500 rpm.
Important
Do not exceed specified speed limits (see page 62)
under any running condition.
Timing system
Desmodromic
(type) with two valves per cylinder,
operated by four rocker arms (2 opening rockers and 2
closing rockers) and an overhead camshaft. It is operated
by the crankshaft through spur gears, belt rollers and
toothed belts.
1
2
3
4
6
5
7
8
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.
fig. 55
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