Checking The Spark Plug - Yamaha YFM125GZ Owner's Manual

EWB00011
WARNING
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Indicates a hazardous situation which, if not
avoided, could result in death or serious injury.
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EBU23211

Checking the spark plug

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The spark plug is an important engine component,
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which is easy to check. Since heat and deposits
will cause any spark plug to slowly erode, the spark
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plug should be removed and checked in accor-
dance with the periodic maintenance and lubrica-
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tion chart. In addition, the condition of the spark
plug can reveal the condition of the engine.
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To remove the spark plug
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1. Remove the spark plug cap.
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1. Spark plug cap
2. Remove the spark plug as shown, with the
spark plug wrench included in the owner's tool
kit.
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