Yamaha YZ250F 2004 Manuel D'atelier Du Proprietaire page 602

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IGNITION SYSTEM
EC626002
IGNITION COIL INSPECTION
1. Inspect:
• Primary coil resistance
Out of specification → Replace.
Tester (+) lead → Orange lead 1
Tester (– ) lead → Black lead 2
0.08 ~ 0.10 Ω at
2. Inspect:
• Secondary coil resistance
Out of specification → Replace.
Tester (+) lead → Orange lead 1
Tester (– ) lead → Spark plug terminal 2
Secondary coil
3. Inspect:
• Sealed portion of ignition coil a
• Spark plug terminal pin b
• Threaded portion of spark plug c
Wear → Replace.
CDI MAGNETO INSPECTION
1. Inspect:
• Pickup coil resistance
Out of specification → Replace.
Tester (+) lead → Red lead 1
Tester (– ) lead → White lead 2
P
B
6 - 5
ELEC
Primary coil
Tester selector
resistance
20 ° C (68 ° F)
Tester selector
resistance
4.6 ~ 6.8 kΩ at
20 ° C (68 ° F)
Pickup coil
Tester selector
resistance
248 ~ 372 Ω at
20 ° C (68 ° F)
+
position
Ω × 1
position
kΩ × 1
position
Ω × 100

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Yz250ft 2004

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