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ZAUM00**
1. Spark plug cap
To check the spark plug
1. Check that the porcelain insula-
tor around the center electrode
of the spark plug is a medium-to-
light tan (the ideal color when the
vehicle 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.
Instead, have a Yamaha dealer check
the vehicle.
2. Check the spark plug for elec-
trode erosion and excessive
PERIODIC MAINTENANCE AND ADJUSTMENT
carbon or other deposits, and re-
place it if necessary.
Specifi ed spark plug:
BPR7HS (NGK)
1
To install the spark plug
1. Measure the spark plug gap with
a wire thickness gauge and, if
necessary, adjust the gap to
specifi cation.
1
ZAUM00**
1. Spark plug gap
Spark plug gap:
0.6 - 0.7 mm (0.024 - 0.028 in)
2. Clean the surface of the spark
3. Install the spark plug with the
Tightening torque:
TIP
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 fi nger tight. However, the
spark plug should be tightened to the
specifi ed torque as soon as possible.
4. Install the spark plug cap.
5. Install the panel.
6-9
plug gasket and its mating sur-
face, and then wipe off any grime
from the spark plug threads.
spark plug wrench, and then
tighten it to the specifi ed torque.
Spark plug:
20 Nm (2.0 m·kgf, 14.4 ft·lbf)
EAU1722A
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Table of Contents
Troubleshooting
