Checking The Rectifier/Regulator - Yamaha R1 Series 2015 Service Manual

(from the wire harness)
2. Check:
• Stator coil resistance
Out of specification
Stator coil resistance
0.112–0.168
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a. Connect the digital circuit tester to the stator
coil coupler as shown.
Digital circuit tester
90890-03174
Model 88 Multimeter with tachom-
eter
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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EAS30680

CHECKING THE RECTIFIER/REGULATOR

1. Check:
• Rectifier/regulator input voltage
Out of specification
condition.
Refer to "CHECKING THE STATOR COIL"
on page 8-187.
Rectifier/regulator input voltage
above 14 V at 5000 r/min
Replace the stator coil.
(W-W)
1 2 3
W W W
Correct the stator coil
ELECTRICAL COMPONENTS
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a. 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"
b. Start the engine and let it run at approximate-
ly 5000 r/min.
c. Measure the rectifier/regulator input voltage.
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2. Check:
• Rectifier/regulator output voltage
Out of specification
er/regulator.
Regulated voltage (DC)
14.3–14.7 V
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a. Connect the pocket tester (DC 20 V) to the
battery as shown.
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
8-188
1 2 3
W W W
Replace the rectifi-