(upper dead centre) and
"P"
(advanced ignition), another mark is
on the crankcase, next to the oil filler
and
the hole
that
i·S
dosed
with
a rubber plug.
The advanrced
igni·tion
must
be
timed in t·he
foHow
i
ng
order:
Check and, if necessary, adjust
the
break-er point gap which must
be equal to
0.4 to 0.6 mm, with the breaker contacts fully open. Con-
nect a test lamp with a socket so
that
one end
of
its wire is
atta-
ched to the low-tension terminal
of
the coi1! (the terminal to which
the wire
leading
to the breaker is connected), and the other end, to
"earth"
.
Such
test
lamp can be easily made by any amateur.
It
consists
ol
a
12
V 1
cp
bulb, lamp holder
and
two conductons provided, if pos-
~ibl
e
,
with two clips of the alligator type.
Turn the crankshaft in the direction
of
its
mtation
until the
mark
on the crankcase is made to coincide with the
mark
"P"
on the fly-
wheel.
Bring
apart
the weights
of
the automatic device,
and
rotate
the
pody of the breaker (after first slackening its fixing screws)
until the test lamp comes on. This done,
fix
the given posi,tion
of
the
breaker body with screws and disconnect the lamp.
In this case the ignition advance angle with respect to the crank-
shaft
will be equaJ ,to
32
to 36° before upper dead centre.
Check the ignition adv.ance
angle
after every
1000
km run
of
the
motorcycle.
Check and, if necessary, adju
st
the gap between the
spark
dis-
chargers in the ignition coil. This
gap
must be equal to 8 to 9 mm.
The
springs
of
the breaker automa.tic device must
not
be
bent
or stretched
as
they
are
calibrated according to the specified para-
meters.
Lubri
ca
t
ing
System
The
engine
lu
bricating
system is
of
the combined type
(using
forced-feed
and
splash
lubrication). The general lubrication
diagram
is presented in Fig. 10.
O
il
is poured into
.the
crankcase through the
fi
ller which is clo-
sed with
plug
12 fitted with an oil ·dipsti·ck. From the crankcase,
the oil is sucked in through
gauze
fi
Iter 14 by means
of
a
gear
pump
installed in the body
of
the front bearing. The
latter
is actua.ted
from the
gear
w
hi
ch is
engage
d with the driving pinion
of
the ti-
ming
gear. The oil pump is provided with two
gears
installed in its
housing, which deliver oil into
main
oil line 19. To prevent an ab-
normal oil pressure rise in the system, reducing valve
16
is provi-
ded in the housing
of
the
oi
l pump.
If
the oil system operates properly,
an
excessive oil pressure for-
ces the reducing valve open and
an
excess
of
oil is allowed to flow
back into the
suction duct
of
the oil pump.
An oil pump installed on the motorcycle engine provides an
ac-
cess to the reducing valve without removing the front cover. The
r.e
-
ducing valve does not need any
adjustment
while in servi·
ce.
29
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