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IGNITION SYSTEM
DOUBLE CONTACT BREAKER
Main
features
Contact pOints gap
:
Contact pressure
:
Opening angle:
Closing angle
:
Timing
angle
mm
0,37
+
0,43
gr 550
±
50
180"
±
5°
180"
±
5"
between the
two
points:
225
0
±
,.
Ignition
automatic advance diagram
(see
Drwg.
327/ 1).
ADJUSTING THE CONTACT POINTS FOR
RIGHT CYLINDER
BREAKER
(RED CABLE)
(Iig,
328)
Rotate
the breaker
shaft
until
the
contact
points
reach
their max. gap
;
at
this stage
fit
the
feele
r
gauge
..
A" 1290 90 90 between
the
contact
points, check
th
at
the gap is as specified
:
mm
0,37
+
0,43
(.015"·.018").
If
the gap
is
more or less,
loosen
the screws
..
B
"
and
..
C
..
and
turn
the
plate
..
0
..
to the
right or to the
lelt.
acting on
the
notch
..
E
..
with a
screw
driver,
until the
specified gap
is
reached.
ADJUSTING THE CONTACT POINTS FOR
LEFT CYLINDER BREAKER (GREEN
CABLE)
(fig.
239)
Rotate the
breaker
shalt
until
the
contact
points
reach their
max. gap; at
this stage
fit the feeler
gauge
"
A
"
12 90 90 90 between the contact
points,
checking
that the gap is as specified
:
mm 0,37
+
0,43 (.015"-.018")
.
If
the
gap
Is more
or less, loosen the screws
~
B
..
and" C
..
and
turn the plate
..
0
"
to the
right
or
to
the left,
acting on
notch
..
E
..
with
a
screw
driver,
until the
specified gap is
reached.
IGNITION TIMING FOR RIGHT CYl:INDER
(RED
CABLE)
(fig
.
330)
After adjusting
the breaker contact points and
fitti
ng
the
double
breaker
onto the
engine.
proceed
as
follows:
-
connect the feed clamp
of
unit
",
A
..
to
the
red
cable, and
the
ground
clamp
..
B
..
to
a
fin
on
the
engine
crankcase;
rotate the alternator
clockwise,
using tool
..
C
.. ,
until
the
letter
"
0
"
stamped on the
flywheel
(right cylinder) is
aligned with the
mark
at
the
middle
of
the
inspection
hole
rim
..
E
-;
piston
must
be at
T.O.C.
(closed
valves):
rotate the alternator counterclockwise until
the
mark
..
A.F
...
stamped on
the
flywheel
(static advance)
is
aligned with
the mark
attha
middle
of
the Inspection hole
rim
..
E
..
.
At this
stage
,th
e
indicator
..
F
"
starts
mo-
ving
clockwise.
If
the
Ind
icator
does
not
move
the above spe-
cified point,
loosen the screws securing
dou-
ble
breaker
to
crankcase
usint
tool
14927000
(13
in
fig.
330) and
turn the
breaker to the left
or
to the right until
the Indicator
"
F
"
starts
moving
at
the specified
point.
Then lock
the screws securing
breaker
to crank-
case and detach the clamps from
the red
cable.
IGNITION TIMING FOR LEFT CYLINDER
(GREEN CABLE)
(lig. 331)
After timing
the
right
cylinder (red cable),
pro-
ceed
with
the
left
cyli
nder
(green cable).
Proceed as
specified
under
the
previous pa-
ragraph,
paying
allention
to the followings
changes.
-
Connect
the
feed
clamp
..
G
"
to the green
cable;
-
rolate
the
alternator
clockwise,
using tool
..
C
"
.
until
the
leller
"S"
stamped on
the
flywheel (left cylinder)
Is
aligned with the
mark at
the
middle
of the inspection hole
rim
"
E
".
If the
ind
icator
does not
move
at the above
specified
point.
loosen
the
screws "H
..
using
a screwdriver and
turn
the
plate
to the
right
or to
the
left
until
the Indicator
starts
moving
at
the specified
point.
Then
lock the
screws and
detach the
feed
clamp
from the green
cable,
the
ground clamp
from the
crankcase
fin,
then
re-fit the breaker
cover.
CECKING THE IGNITION ADVANCE
(STATIC
+
AUTOMATIC) FOR RIGHT
CYLINDER BY MEANS OF A
"
STROBOSCOPE LAMP
.. (fig.
332-333/
1)
-
Remove the
rubber
cap
from the
inspec-
tion
hole
..
A
"
.
which
is located on the
gearbox housing
,
right
side;
-
conect
the stroboscope cable
..
A
..
to
the
right
cylinder
spark
plug
lead
;
connect
the
stroboscope clamped cables
to
the
battery: the
clamp
..
B
.
marked
(+)
to the battery positive pole (
+),
the
clamp
..
C
..
marked (-) to the batlery negative
pole
(-);
-
first remove
the
cover. then rotate the
flywheel,
using the proper
screw, clockwise
in such a
way
as
to
align
the letter
"0,,
stamped on
the lIywheel
with the
mark at
the middle of the
inspection
hole rim
..
E
-;
-
starl the
engine
and point the
stroboscope
light
itlto
hole
"
E
"
,
checking
that the
ad-
vance mark" AF
..
is aligned
with the mark
at
the
middle
of
the inspection hole rim
. A"
at
1000
+
1200 rpm
±
200
and
the
full
ad~
vance
mark (static
+
dynamic)
"AT
..
is ali-
gned with
the mark at
the middle
of the In-
spection
hole
rim
"
F" at
6000
+
6200
rpm
±
200.
155
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