Yamaha YZ85(T) Owner's Service Manual page 460

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2
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
5PA60060
2. Inspect:
Secondary coil resistance
G
Out of specification → Replace.
Tester (+) lead → Spark plug lead 1
Tester (–) lead → Orange lead 2
5PA60070
NOTE:
Remove the spark plug cap by turning it
G
counterclockwise and inspect.
Install the spark plug cap by turning it clock-
G
5PA60070
wise until it is tight.
SPARK PLUG CAP INSPECTION
1. Inspect:
Spark plug cap
G
Loose connection → Tighten.
Deteriorated/Damaged → Replace.
Spark plug cap resistance
G
Out of specification → Replace.
Tester (+) lead →
5PA60070
Tester (–) lead → Spark plug terminal 2
6 - 4
ELEC
Primary coil
Tester selector
resistance
0.18 ~ 0.28 Ω at
20 °C (68 °F)
Secondary coil
Tester selector
resistance
6.3 ~ 9.5 kΩ at
20 °C (68 °F)
Spark plug lead terminal 1
Spark plug cap
Tester selector
resistance
4 ~ 6 kΩ at
20 °C (68 °F)
+
position
Ω × 1
position
kΩ × 1
position
kΩ × 1

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