Yamaha YZFR1W 2007 Service Manual page 411

Minimum ignition spark gap
6.0 mm (0.24 in)
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a. Disconnect the ignition coil 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. Ignition coil
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
resistance
336–504 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.
position sensor
8-92
ELECTRICAL COMPONENTS
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
• Positive tester probe
Gray "1"
• Negative tester probe
Black "2"
b. Measure the crankshaft position sensor
resistance.
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EAS28130
CHECKING THE LEAN ANGLE SENSOR
1. Remove:
• Lean angle sensor
(from the bracket.)
2. Check:
• Lean angle sensor out put voltage
Out of specification → Replace.
Lean angle sensor out put volt-
age
Less than 65°: 0.4–1.4 V
More than 65°: 3.7–4.4 V
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a. Connect the lean angle sensor coupler to
the wire harness.
b. Connect the pocket tester (DC 20 V) to the
lean angle sensor coupler as shown.
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
• Positive tester probe
Yellow/Green "1"
• Negative tester probe
Black/Blue "2"