Spark Gap Test - Yamaha SRX440 1980 Service Manual

1980 SRX440
4. Starting at T.D.C., rotate flywheel coun-
terclockwise until dial gauge reads ap-
proximately 3-1/2 needle revolutions
before-top-dead-center (BTD.C.l.
5. Slowly turn flywheel clockwise until dial
gauge reads specified ignition timing.
Ignition timing (B.T.D.C.)
1.4±0.1 mm (0.055±0.004 in)
c. Tighten base set screw.
Tightening torque:
7 Nm (0.7 m-kg)
d. Install the starter assembly. (Refer to
"2-2- F Starter")
7. Remove the dial gauge and stand. Re-
place the spark plug.
6. Check the marks on flywheel and base
for alignement.
Spark plug tightening torque:
28 Nm (2.8 rn-kq)
CD
NOTE: - - - - - - - - - - - -
The timing light should be used to check if
the marks on the rotor and base are aligned
when both are replaced with new ones. The
marks should align at any specified timing.
3. Start engine and increase spark gap
until misfire occurs.
misfire and weak spark using the Electro
Tester. If the ignition system will fire across a
sufficient gap, the engine ignition system can
be considered good. If not, proceed with in-
dividual component test until the probelm is
found.
1. Warm up engine thoroughly so that all
electrical components are at operating
temperature.
2. Stop engine and connect tester as
shown.
0, Spark gap test
88)
+
1. Electro-Tester
2. Plug wire from coil
3. Spark plug
I
Minimum spark gap: 6 mm (0.24 in)
I
If not aligned, adjust ignition timing as
follows.
a. Remove the manual starter assembly.
b. Loosen the base set screws and turn the
base assembly until mark alignment is
achieved.
7-4