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EBU23211
Checking the spark plug
The spark plug is an important engine component,
which is easy to check. Since heat and deposits
will cause any spark plug to slowly erode, the spark
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.
2. Remove the spark plug as shown, with the
spark plug wrench included in the owner’s tool
kit.
To check the spark plug
1. Check that the porcelain insulator around the
center electrode of the spark plug is a medi-
um-to-light tan (the ideal color when the ATV
is ridden normally).
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.
1. Spark plug cap
1
1. Spark plug wrench
1
Summary of Contents for YFM80RX
Page 1: ...This A MANUAL DEL PROPIETARIO 5TH 28199 66 YFM80RX MANUEL DU PROPRIÉTAIRE OWNER S MANUAL ...
Page 2: ...PRINTED IN JAPAN 2007 05 0 3x1 E F S YAMAHA MOTOR CO LTD ...
Page 3: ...This A 5TH 28199 66 E0 YFM80RX OWNER S MANUAL ...
Page 4: ......
Page 11: ...Storage 9 2 SPECIFICATIONS 10 1 CONSUMER INFORMATION 11 1 Identification numbers 11 1 ...
Page 46: ...7 1 1 2 3 4 5 6 7 8 9 10 11 EBU21141 RIDING YOUR ATV ...
Page 115: ......
Page 116: ...PRINTED IN JAPAN 2007 05 0 3x1 E YAMAHA MOTOR CO LTD PRINTED ON RECYCLED PAPER ...