Service manual

1980 SRX440
E. Ignition coil
1. Coil spark gap test
a. Remove the ignition coil from frame.
b. Connect Electro Tester as shown.
c. Connect
fully charged battery to tester.
d. Turn on spark gap
switch and increase
gap until misfire occurs.
Minimum spark gap: 6 mm (0.24 in)
o
f)
- Primary coil resistance
-- -- Secondary col! resistance
F. Spark plug
The life of a spark plug and its discoloring
vary according to the habits of
the rider. At
each periodic inspection. replace burned or
fouled plug
with suitable one. Suitability may
be determined by asking the rider how long
and
how fast he rides. Recommend a hot.
standard. or cold oluo tvoe accordinclv. It is
1.'. Battery
2.6mm
2. Coil winding resistance tests
Use a
pocket tester or equivalent ohm-
meter to determine resistance and con-
tinuity of primary and secondary coil
windings.
.
Primary coil
?eco~~~y coil
resistance
resls, .,}"ICe
0.15Q±10%
3.6kn'±20%
at 20°C (68°F)
at 20°<;: 168° F)
7-5
actually economical to install a. new plug
often since it
will tend to keep the engine in
good. condition and prevent excessive fuel
consu mption.
1.
How to "read" spark plug (condition)
~~'
(The spark plug color~)J1ples are at the
end
of this manual).:r~;;;;··;
CD Good'S'"
The insulator normally has a tan color.
This check should be made
after driving
the machine over a long distance;
otherwise. the correct reading
of the
spark plug will be impossible.
® Bad (Mixture is too rich or spark plus
temperature is low).
If mixture are too rich. the metal shell
end
will be wet as shown in the photo .
acceleration or high-speed performance
will be poor. If the spark plug tempera-
tu re is
low. the phenomenon specified
in above
will not take place. As shown
in the photo. the insulator is dark and
sooty.
@) Bad (Mixture is too lean or spark plug
temperature is high.)
The insulator is roughened
(lower
photo) or burned white (upper photo).
and
the ground electrode is green due
to oxidation. This state
of the spark plug