Checking The Spark Plug - Yamaha Raptor 700R YFM70RSPX Owner's Manual

plug should be removed and checked in accor-
dance with the periodic maintenance and lubrica-
tion chart. In addition, the condition of the spark
plug can reveal the condition of the engine.
To remove the spark plug
1. Remove the spark plug cap.
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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1. Spark plug wrench
To check the spark plug
1. Check that the porcelain insulator around the
NOTE:
If the spark plug shows a distinctly different color,
the engine could be operating improperly. Do not
attempt to diagnose such problems yourself. In-
stead, have a Yamaha dealer check the ATV.
2. Check the spark plug for electrode erosion
8-8
center electrode of the spark plug is a medi-
um-to-light tan (the ideal color when the ATV
is ridden normally).
and excessive carbon or other deposits, and
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