PERIODIC MAINTENANCE AND ADJUSTMENT
7-10
2
3
4
5
6
7
8
9
To install the panel
1. Place the panel in the original po-
sition, and then install the screws.
2. Install panel C.
Panel E
To remove the panel
Remove the screws, and then pull the
panel outward.
To install the panel
Place the panel in the original position,
and then install the screws.
EAU19642
Checking the spark plugs
The spark plugs are important engine
components, which should be checked
periodically, preferably by a Yamaha
dealer. Since heat and deposits will
cause any spark plug to slowly erode,
they should be removed and checked
in accordance with the periodic mainte-
nance and lubrication chart. In addition,
the condition of the spark plugs can re-
veal the condition of the engine.
The porcelain insulator around the cen-
ter 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 en-
gine should have the same color. If any
spark plug shows a distinctly different
color, the engine could be operating im-
properly. Do not attempt to diagnose
such problems yourself. Instead, have
a Yamaha dealer check the vehicle.
If a spark plug shows signs of electrode
erosion and excessive carbon or other
deposits, it should be replaced.
1. Screw
2. Panel D
2
1
1. Screw
1
Specified spark plug:
NGK/CR7E
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