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Yamaha WR450F 2003 Manual De Servicio Del Propietario página 702

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LIGHTING SYSTEM
AC MAGNETO INSPECTION
1. Inspect:
Lighting coil resistance
G
Out of specification → Replace.
Tester (+) lead → Yellow lead 1
Tester (–) lead → Ground 2
Lighting coil
resistance
0.224 ~ 0.336 Ω
at 20 ˚C (68 ˚F)
RECTIFIER/REGULATOR INSPECTION
1. Connect the battery leads.
2. Start the engine.
3. Turn on the headlight and taillight by turn-
ing on the lights switch.
4. Inspect:
Out-put voltage
G
Out of specification → Replace rectifier/
regulator.
Tester (+) lead → Yellow lead 1
Tester (–) lead → Black lead 2
Out-put voltage
13.0 ~ 14.0 V at
5,000 r/min
+
ELEC
Tester selector
position
Ω × 1
Tester selector
position
ACV-20

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