User Guide

59
E
Engine
Twin cylinder, four-stroke, 90°“L” type, longitudinal.
Bore mm/in.:
80 (600); 88 (750); 92 (900).
3.15 (600); 3.46 (750); 3.62 (900).
Stroke mm/in.:
58 (600); 61.5 (750); 68 (900).
2.28 (600); 2.42 (750); 2.68 (900).
Total displacement cu.cm./cu. in.:
583 (600); 748 (750); 904 (900).
35.7 (600); 45.64 (750); 55.16 (900).
Compression ratio ±0.5:1:
10.7 (600); 9.0 (750); 9.2 (900).
Max. power at crankshaft (95/1/CE):
37,5 kW - 51HP at 8000 rpm (600).
45,6 kW - 62HP at 7500 rpm (750).
57 kW - 78HP at 8250 rpm (900).
Max torque at crankshaft (95/1/CE):
50 Nm at 6000 rpm (600).
62 Nm at 6500 rpm (750).
73 Nm at 6750 rpm (900).
Important
Do not exceed specified speed limits (see page 60)
under any running condition.
1
5
7 8
2
3
4
6
Timing system
Desmodromic (type) with two valves per cylinder,
operated by four rockers (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.
Desmodromic timing system (fig. 43)
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. 43