Yamaha VINO XC50X Owner's Manual page 41

3. Remove the spark plug cap.
ZAUM00**
1. Spark plug wrench
4. Remove the spark plug as shown,
with a spark plug wrench available
at a Yamaha dealer.
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 vehicle is
ridden normally).
NOTE:
If the spark plug shows a distinctly dif-
ferent color, the engine could be operat-
ing improperly. Do not attempt to diag-
PERIODIC MAINTENANCE AND MINOR REPAIR
nose such problems yourself. Instead,
have a Yamaha dealer check the vehicle.
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2. Check the spark plug for electrode
erosion and excessive carbon or
other deposits, and replace it if nec-
essary.
Specified spark plug:
CR7E (NGK)
To install the spark plug
1. Measure the spark plug gap with a
wire thickness gauge and, if nec-
essary, adjust the gap to specifi-
cation.
Spark plug gap:
0.7 ~ 0.8 mm (0.028 ~ 0.031 in)
2. Clean the surface of the spark plug
gasket and its mating surface, and
then wipe off any grime from the
spark plug threads.
3. Install the spark plug with the spark
plug wrench, and then tighten it to
the specified torque.
NOTE:
If a torque wrench is not available when
installing a spark plug, a good estimate
of the correct torque is 1/4 ~ 1/2 turn
past finger tight. However, the spark plug
should be tightened to the specified
torque as soon as possible.
4. Install the spark plug cap.
5. Install the partition and the panel.
6-7
Tightening torque:
Spark plug:
13 Nm (1.3 m • kgf, 9.4 ft • lbf)
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