Checking The Starter Motor Operation; Checking The Stator Coil; Checking The Rectifier/Regulator - Yamaha RAPTOR YFM125RA Service Manual

b. Measure the pickup coil resistance.
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EAS28940
CHECKING THE STARTER MOTOR OPERA-
TION
1. Check:
• Starter motor operation
Does not operate → Perform the electric
starting system troubleshooting, starting
with step 4.
Refer to "TROUBLESHOOTING" on page
7-9.
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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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ELECTRICAL COMPONENTS
EAS28150

CHECKING THE STATOR COIL

1. Disconnect:
• Stator coil coupler
(from the wire harness)
2. Check:
• Stator coil resistance
Out of specification → Replace the
pickup coil/stator coil assembly.
Stator coil resistance
0.64–0.96 Ω (W–W)
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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"
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
7-40