Yamaha WR250FM Bicycle User Manual


 
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ELEC
EC626002
IGNITION COIL INSPECTION
1. Remove the ignition coil cap.
2. Inspect:
Primary coil resistance
Out of specification Replace.
Tester (+) lead Orange lead 1
Tester () lead Black lead 2
Primary coil
resistance
Tester selector
position
0.08 ~ 0.10 at
20 °C (68 °F)
× 1
3. Inspect:
Secondary coil resistance
Out of specification Replace.
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
4. Inspect:
Sealed portion of ignition coil a
Spark plug terminal pin b
Threaded portion of spark plug c
Wear Replace.
IGNITION SYSTEM