Yamaha Raptor YFM7RB Owner's Manual page 92

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.
8
1. Spark plug cap
2. Remove the spark plug as shown, with the
spark plug wrench included in the owner's tool
kit.
1
1. Spark plug wrench
To check the spark plug
1. Check that the porcelain insulator around the
TIP
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.
8-10
center electrode of the spark plug is a medi-
um-to-light tan (the ideal color when the ATV
is ridden normally).
1