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Yamaha WR450F(T) - Page 662

Yamaha WR450F(T)
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6 - 6
+
ELEC
IGNITION SYSTEM
3. Inspect:
Secondary coil resistance
Out of specification Replace.
4. Inspect:
Sealed portion of ignition coil a
Spark plug terminal pin b
Threaded portion of spark plug c
Wear Replace.
AC MAGNETO INSPECTION
1. Inspect:
Pick-up coil resistance
Out of specification Replace.
NEUTRAL SWITCH INSPECTION
1. Inspect:
Neutral switch conduct
No continuity while in neutral Replace.
Continuity while in gear Replace.
EC628000
CDI UNIT INSPECTION
Check all electrical components. If no fault is
found, replace the CDI unit. Then check the
electrical components again.
Tester (+) lead
Orange lead
1
Tester () lead
Spark plug terminal
2
Secondary coil
resistance
Tester selector
position
4.6 ~ 6.8 k
at
20 °C (68 °F)
k
×
1
Tester (+) lead
Red lead
1
Tester () lead
White lead
2
Pick-up coil
resistance
Tester selector
position
248 ~ 372
at
20 °C (68 °F)
×
100
Tester (+) lead
Sky blue lead
1
Tester () lead
Ground
2
Sb
1
Ground
Tester selec-
tor position
NEUTRAL
×
××
×
1
IN GEAR
RW
1
2
+
Ω×1
1
2
L/WSb

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