Yamaha TTR250L Service Manual page 286

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Start the engine and accelerate to about
3,000 r/min.
Check the charging voltage.
Charging voltage:
13.0 ~ 15.0 V at 3,000 r/min.
NOTE:
Use a fully charged battery.
NB285150
4.Stator coil resistance
Disconnect the stator coil coupler from
the wireharness.
Connect the pocket tester (Ω × 1) to the
stator coils.
Measure the stator coil resistances.
NB285160
5.Wiring connection
Check the entire charging system for
connections.
Refer to "WIRING DIAGRAM".
Replace the rectifier/regulator.
CHARGING SYSTEM
OUT OF
SPECIFICATION
BOTH MEET
SPECIFICATIONS
CORRECT
7 - 25
MEETS SPECIFICATION
Charging circuit is good.
Tester (+) lead → White lead 1
Tester (–) lead → White lead 2
Tester (+) lead → White lead 1
Tester (–) lead → White lead 3
Stator coil resistance:
1.0 ~ 1.2 Ω at 20°C (68°F)
OUT OF SPECIFICATION
Replace the stator assembly.
POOR CONNECTION
Correct.
+
ELEC

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