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EAU1722A
PERIODIC MAINTENANCE AND ADJUSTMENT
Panel C
To remove the panel
1
1. Panel C
1. Open the seat. (See page 3-8.)
2. Remove the screws, and then
take the panel off.
To install the panel
Place the panel in the original posi-
tion, and then install the screws.
EAUT2070
Checking the spark plug
The spark plug is an important engine
component, which is easy to check.
Since heat and deposits will cause
any spark plug to slowly erode, the
spark plug should be removed and
checked in accordance with the pe-
riodic maintenance and lubrication
chart. In addition, the condition of the
spark plug can reveal the condition of
the engine.
To remove the spark plug
1. Remove panel A. (See page 6-8.)
2. Remove the spark plug cap.
1
1. Spark plug wrench
3. 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 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
carbon or other deposits, and re-
place it if necessary.
Specifi ed spark plug:
CR7E (NGK)
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