8-10
8
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 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).
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.
1. Spark plug cap
1
1. Spark plug wrench
1
UBW463E0.book Page 10 Monday, January 28, 2019 10:22 AM
Summary of Contents for YFZ50 2019
Page 2: ...DIC183 Original instructions Notice originale Manual original PRINTED IN TAIWAN 2019 01 E F S...
Page 13: ...1 2 1 7 1 5 6 2 4 3 UBW463E0 book Page 2 Monday January 28 2019 10 22 AM...
Page 54: ...7 1 7 EBU21142 RIDING YOUR ATV UBW463E0 book Page 1 Monday January 28 2019 10 22 AM...
Page 122: ...11 2 11 1 Model label 1 UBW463E0 book Page 2 Monday January 28 2019 10 22 AM...
Page 125: ...UBW463E0 book Page 3 Monday January 28 2019 10 22 AM...