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Periodic maintenance and adjustment
2. Install cowling C and panel B.
Panels A and B
To remove a panel
Remove the quick fasteners, and then
pull the panel off as shown.
2
1
1. Panel A
2. Quick fastener
To install a panel
Place the panel in the original position,
and then install the quick fasteners.
Checking the spark plugs
The spark plugs are important engine
EAU79970
components,
checked periodically, preferably by a
Yamaha dealer. Since heat and depos-
its will cause any spark plug to slowly
erode, they should be removed and
checked in accordance with the peri-
odic maintenance and lubrication
chart. In addition, the condition of the
spark plugs can reveal the condition of
the engine.
The porcelain insulator around the
center electrode of each spark plug
should be a medium-to-light tan (the
ideal color when the vehicle is ridden
normally), and all spark plugs installed
in the engine should have the same
color. If any spark plug shows a dis-
tinctly different color, the engine could
be operating improperly. Do not at-
tempt to diagnose such problems
yourself. Instead, have a Yamaha deal-
er check the vehicle.
If a spark plug shows signs of elec-
trode erosion and excessive carbon or
other deposits, it should be replaced.
Specified spark plug:
NGK/CR10EK
Before installing a spark plug, the
spark plug gap should be measured
with a wire thickness gauge and, if
necessary, adjusted to specification.
8-11
EAU19653
which
should
be
8
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Table of Contents
Troubleshooting
