Yamaha YZF-R1B 2012 Service Manual page 536

Manuals by Motomatrix / www.motomatrix.co.uk / The Solution For Lost Motorcycle Coded Keys
EAS28150
CHECKING THE STATOR COIL
1. Disconnect:
• Stator coil coupler
(from the wire harness)
2. Check:
• Stator coil resistance
Out of specification → Replace the stator
coil.
Stator coil resistance
0.112–0.168 Ω at 20 °C (68 °F)
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a. Connect the digital circuit tester to the sta-
tor coil coupler as shown.
Digital circuit tester
90890-03174
Model 88 Multimeter with
tachometer
YU-A1927
• Positive tester probe
White "1"
• Negative tester probe
White "2"
• Positive tester probe
White "1"
• Negative tester probe
White "3"
• Positive tester probe
White "2"
• Negative tester probe
White "3"
b. Measure the stator coil resistance.
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email: info@motomatrix.co.uk
ELECTRICAL COMPONENTS
EAS28170
CHECKING THE RECTIFIER/REGULATOR
1. Check:
• Rectifier/regulator input voltage
Out of specification → Correct the stator
coil condition.
Refer to "CHECKING THE STATOR
COIL" on page 8-139.
Rectifier/regulator input voltage
above 14 V at 5000 r/min
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a. Set the engine tachometer to the ignition
coil of cylinder #1.
b. Connect the pocket tester (AC 20 V) to the
rectifier/regulator coupler as shown.
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
• Positive tester probe
White "1"
• Negative tester probe
White "2"
• Positive tester probe
White "1"
• Negative tester probe
White "3"
• Positive tester probe
White "2"
• Negative tester probe
White "3"
c. Start the engine and let it run at approxi-
mately 5000 r/min.
d. Measure the rectifier/regulator input volt-
age.
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8-139