Yamaha YFM25RY Automobile User Manual


 
ELECTRICAL COMPONENTS
7-39
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a. Disconnect the spark plug cap from the
ignition coil.
b. Connect the pocket tester ( × 1k) to the
ignition coil as shown.
c. Measure the secondary coil resistance.
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3. Check:
Ignition spark gap
Out of specification Replace.
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a. Disconnect the spark plug cap from the
spark plug.
b. Connect the ignition checker/Opama pet-
4000 spark checker “1” as shown.
c. Set the main switch to “ON”.
d. Measure the ignition spark gap “a”.
e. Crank the engine by pushing the starter
switch and gradually increase the spark
gap until a misfire occurs.
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EAS28110
CHECKING THE PICKUP COIL
1. Disconnect:
Pickup coil coupler
(from the wire harness)
2. Check:
Pickup coil resistance
Out of specification Replace.
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a. Connect the pocket tester ( × 100) to the
pickup coil terminal as shown.
Secondary coil resistance
6.32–9.48 k
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
Positive tester probe
High tension code “1”
Negative tester probe
Orange “2”
Minimum ignition spark gap
6.0 mm (0.24 in)
Ignition checker
90890-06754
Opama pet-4000 spark checker
YM-34487
2. Spark plug cap
Pick up coil resistance
248–372 (R–W)
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
Positive tester probe
Red “1”
Negative tester probe
White “2”