7
7-9
Periodic maintenance and adjustment
TIP
3. Install the spark plug cap.
TIP
1. Spark plug wrench
1. Spark plug gap
Remove the spark plug as shown,
with the spark plug wrench included
in the owner’s tool kit.
To check the spark plug
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).
If the spark plug shows a distinctly dif-
ferent color, the engine could be oper-
ating improperly. Do not attempt to
diagnose such problems yourself. In-
stead, have a Yamaha dealer check
the vehicle.
4.
1.
Check the spark plug for electrode
erosion and excessive carbon or
other deposits, and replace it if
necessary.
Measure the spark plug gap with a
wire thickness gauge and, if nec-
essary, adjust the gap to specifi-
cation.
2.
Specified spark plug:
NGK/CPR8EA-9
3.
Spark plug gap:
0.8–0.9 mm (0.031–0.035 in)
To install the spark plug
Clean the surface of the spark plug
gasket and its mating surface, and
then wipe off any grime from the
spark plug threads.
Install the spark plug with the spark
plug wrench, and then tighten it to
the specified torque.
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.
Tightening torque:
Spark plug:
13 Nm (1.3 m·kgf, 9.4 ft·lbf)
1.
2.
Install the spark plug cap so that it is
positioned as shown in the illustration
and the spark plug lead does not con-
tact any surrounding parts.
TIP
To Next Page
Loading...
