Yamaha YZF-R125 Service Manual: Checking the stator coil

1. Disconnect:

  • Stator coil coupler (from the wire harness)

2. Check:

Stator coil resistance Out of specification → Replace the crankshaft position sensor/stator assembly.


a. Connect the pocket tester ( ×
1) to the stator coil coupler as shown.



Checking the stator coil


b. Measure the stator coil resistance.

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    Checking the rectifier/regulator
    1. Check: Rectifier/regulator output voltage Out of specification → Replace the rectifier/ regulator. a. Set the engine tachometer to the spark plug lead. b. Connect the pocket tester ...

    Other materials:

    Troubleshooting charts
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    1. Check: Starter motor operation Does not operate → Perform the electric starting system troubleshooting, starting with step 4. Refer to "TROUBLESHOOTING" on page 8-9. a. Connect the positive battery terminal "1" and starter motor lead "2" with a jumper lead "3". W ...

    For your safety - pre-operation checks
    Inspect your vehicle each time you use it to make sure the vehicle is in safe operating condition. Always follow the inspection and maintenance procedures and schedules described in the Owner's Manual. WARNING Failure to inspect or maintain the vehicle properly increases the possibility of ...

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