Yamaha FZ1-N Service Manual page 428

• Positive tester probe
Ignition coil terminal
• Negative tester probe
Ignition coil terminal
c. Measure the primary coil resistance.
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2. Check:
• Secondary coil resistance
Out of specification → Replace.
Secondary coil resistance
8.5–11.5 kΩ at 20°C (68°F)
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a. Disconnect the ignition coil leads from the
wire harness.
b. Connect the pocket tester (Ω × 1k) to the
ignition coil as shown.
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
• Negative tester probe
Ignition coil terminal "1"
• Positive tester probe
Spark plug terminal "2"
c. Measure the secondary coil resistance.
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ELECTRICAL COMPONENTS
3. Check:
• Ignition spark gap "a"
Out of specification → Replace.
Minimum ignition spark gap
6.0 mm (0.24 in)
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a. Disconnect the spark plug cap from the
spark plug.
b. Connect the ignition checker/dynamic
spark tester "2" as shown.
Ignition checker
90890-06754
Opama pet-4000 spark checker
YM-34487
1. Spark plug cap
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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EAS28120
CHECKING THE CRANKSHAFT POSITION
SENSOR
1. Disconnect:
• Crankshaft position sensor coupler
(from the wire harness)
2. Check:
• Crankshaft position sensor resistance
Out of specification → Replace the crank-
shaft position sensor.
Crankshaft position sensor
resistance
336–504 Ω at 20°C (68°F)
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