Checking The Stator Coil; Checking The Rectifier/Regulator - Yamaha YZFR6X(C) 2008 Service Manual

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a. Connect the positive battery terminal "1"
and starter motor lead "2" with a jumper
lead "3".
EWA13810
WARNING
• A wire that is used as a jumper lead must
have at least the same capacity of the bat-
tery lead, otherwise the jumper lead may
burn.
• This check is likely to produce sparks,
therefore, make sure no flammable gas or
fluid is in the vicinity.
b. Check the starter motor operation.
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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
0.12–0.18 Ω at 20 °C (68 °F)
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a. Connect the pocket tester (Ω × 1) to the
stator coil coupler as shown.
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
• Positive tester probe →
white "1"
• Negative tester probe →
white "2"
ELECTRICAL COMPONENTS
• 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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EAS28170

CHECKING THE RECTIFIER/REGULATOR

1. Check:
• Charging voltage
Out of specification → Replace the recti-
fier/regulator.
Charging voltage
14 V at 5000 r/min
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a. Set the engine tachometer to the cylinder-
#1 ignition coil.
b. Connect the pocket tester (DC 20 V) to the
rectifier/regulator coupler as shown.
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
• Positive tester probe →
red "1"
• Negative tester probe →
black "2"
8-94
W W W
1 2 3