6
PERIODIC MAINTENANCE AND MINOR REPAIR
6-8
1. Spark plug cap
1. Spark plug wrench
EAU01833
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 accordance with the periodic main-
tenance and lubrication chart. In addi-
tion, 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 medium-to-light tan
(the ideal color when the
motorcycle is ridden normally).
NOTE:
If the spark plug shows a distinctly
different color, the engine could be
defective. Do not attempt to diagnose
such problems yourself. Instead, have
a Yamaha dealer check the motorcycle.
2. Check the spark plug for electrode
erosion and excessive carbon or
other deposits, and replace it if
necessary.
1
ZAUM0035
1
ZAUM0036
Summary of Contents for TEO'S XN125
Page 1: ...5MF F8199 E0 XN125 OWNER S MANUAL ...
Page 7: ......
Page 11: ......
Page 12: ...2 DESCRIPTION Left view 2 1 Right view 2 2 Controls and instruments 2 3 ...
Page 27: ......
Page 28: ...4 PRE OPERATION CHECKS Pre operation check list 4 1 ...
Page 31: ......
Page 37: ......
Page 71: ......
Page 72: ...7 SCOOTER CARE AND STORAGE Care 7 1 Storage 7 3 ...
Page 77: ......
Page 78: ...8 SPECIFICATIONS Specifications 8 1 How to use the conversion table 8 4 ...
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Page 89: ......
Page 90: ...YAMAHA MOTOR CO LTD PRINTED IN FRANCE 00 04 E ...