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Yamaha YZ250F Manuel D'atelier Du Proprietaire page 594

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

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Yz250fr