Spark Plug; Contact Breakers; Breaker Cam; Checking Advancing Action - Suzuki GS850G Service Manual

ELECTRICA L ,T YSTEM
Contact breakers
Check and
adjust
the contact points
2 s
outlined on page 3-9. Inspeci the contact
points for wear and burning. I f
the
surfaces
of
the points
are
dirty,
wipe them clean with a
clean,
dry
cloth.
a
Y O R M A L
a
W O R N
e
' i r '
a
a
NOT PARALLEL DIRTY
Fig.
1
2 - , ?
Breaker
cam
Check the contact breaker
cam
for wear, rust,
or
pits that might
cause
rapid wear
of
the
breaker rubbing blocks.
Condensers
Use the electro-tester to
check the
condition
of each
condenser. When doing
this,
be sure
to
lift the condenser off the breaker base
plate
by removing the screws securing it to the
base.
Checking
advancing action
Upon starting up the engine, check
engine
speeds at
which th e
ignition begins to advance
or
retard, using the electro-tester (special
tool):
f ' i ~ . 12-.5
SPARK PLUG
Spark ptugs ignite
the
fuel/air mixture in the
cylinder.
For effective ignition at
the required
time, the correct plugs
should
always be
used,
and
they should be properly adjusted and
cleaned.
Fgnition timing
-
NPPON
NGK
DENSO
Remarks
IT the rlandard
pliie i~ apt
lo ~ c t
B7ES W22ES
wet. rcplacc
wil
h
I hi< plug. Hor
1YW.
I f thr
<taltdard
plug is api rn
B9ES U'27ES overhc;~~. replacc n~th !hl\ pltlg.
Cold
r y e .
17" below 1 500
r/min
37" over 2
500
r/min
NGK B8ES or NTPPON DENSO W24ES
listed in the above table should he used
as the
standard plug. However thc heat range of the
plug should
be selected to meel
the
requirements of speed, actual toad, fuel, etc.
If
tlie plugs need to be replaced.
it
is
recommended that ones having
a
heat range
closest to the standard plug in the
above
table
be selected.
Remove the plugs a n d inspect the insulalors.
Proper heat range would be indicated if all
four inwlatorr; were light brown in color, If
they are blackened by carbon, they should he
replaced by a hot tvpe NGK B7ES or NIPPON
DENSO W22ES
and
if baked white. by NGK
R9ES or NIPPON DENSO W27ES.
plugs
with
high
heat range number are used
for high speed running. These
plugs
are
designed
to be sufficiently cooled to
prevent
overheating and are called cold
type plugs.