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MAIN FEATURES
ENl;iIN
E
(See
fig
.
5/
1)
12
Cycle
Number
of cyli nders
Cylinder
disposition
Bore
Stroke
Displacement
fig
.
5/
1
J
4 s
tro
kes
2
.V.9O"
83
mm
(3.2S")
78
mm
(3.07"
)
844.05
ce.
(51,5
cu.
In.)
v.rve
gear
Compression
ratio: 9.2
to
I
Revs at maximum
engine
speed
6500
r.p.m.
Outpu
t
81
maxi-
mum
engine
speed:
84 HP
SAE
Crankcase
In
IIghl alloy
Cylinders
In lig
ht
alloy
with
hard
chromed
barrels
Cylinder heads
In light
alloy,
hemisphe
rical,
with speCial
cas
t
Iron Inserted
seats
steel
construction
Crankshaft
Crankshaft
supports
in
anti-friction
material
pressed
in
2 suitable
hOUSings
Connecting rods
steel
construction
with
Al·TlN
alioy thin wall
bearings
Pistons
In
light
alloy
D.H.V., push rod operated via the camshaft
in the
crankcase and
gear driven by
the
crankshaft.
Inlet:
-
opens
24"
be
fore
TOC
-
cl
oses 58" after
BOC
Exhaust:
-
opens 58"
before BOC
-
closes
22"
after
TOe
Rocker clearance lor valve
timing;
-
0,5
mm.
(.0196")
Normal
rocker
clearance (cold
engine);
-
Inlet
0,15 mm.
(.0059"1
-
exhaust
0,25
mm
.
(.0098"1
"
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