Yamaha YZF-R1B 2012 Service Manual page 534

Manuals by Motomatrix / www.motomatrix.co.uk / The Solution For Lost Motorcycle Coded Keys
2. Check:
• Secondary coil resistance
Out of specification → Replace.
Secondary coil resistance
8.50–11.50 kΩ
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a. Connect the pocket tester (Ω × 1 k) to the
ignition coil as shown.
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
• Negative tester probe
Red/Black "1"
• Positive tester probe
Spark plug terminal "2"
b. Measure the secondary coil resistance.
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3. Check:
• Ignition spark gap
Out of specification → Replace.
Minimum ignition spark gap
6.0 mm (0.24 in)
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a. Connect the ignition checker "1" as shown.
Ignition checker
90890-06754
Opama pet-4000 spark checker
YM-34487
email: info@motomatrix.co.uk
ELECTRICAL COMPONENTS
2. Ignition coil
b. Turn the main switch to "ON" and engine
stop switch to "
c. Measure the ignition spark gap "a".
d. Crank the engine by pushing the start
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
resistance
248–372 Ω at 20 °C (68 °F)
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a. Connect the pocket tester (Ω × 100) to the
crankshaft position sensor coupler as
shown.
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
• Positive tester probe
Gray "1"
• Negative tester probe
Black "2"
8-137
".
position sensor