PERIODIC MAINTENANCE AND ADJUSTMENT
7-9
7
To install the panel
Place the panel in the original position,
and then install the screws.
EAUT1835
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 periodic mainte-
nance and lubrication chart. In addition,
the condition of the spark plug can re-
veal the condition of the engine.
To remove the spark plug
1. Place the vehicle on the center-
stand.
2. Remove panel B. (See page 7-8.)
3. Remove the spark plug cap.
4. Remove the spark plug as shown,
with the spark plug wrench includ-
ed in the owner’s tool kit.
To check the spark plug
1. Check that the porcelain insulator
around the center electrode of the
spark plug is a medium-to-light
tan (the ideal color when the vehi-
cle is ridden normally).
TIP
_
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.
_
2. Check the spark plug for elec-
trode erosion and excessive car-
bon or other deposits, and
replace it if necessary.
1. Panel B
1. Screw (
×
4)
2
1
2
ZAUU0941
ZAUU0616
1. Spark plug cap
2. Spark plug
2
1
ZAUU0932
Specified spark plug:
NGK/CR7E
1PNF8199E0.book Page 9 Friday, August 24, 2012 2:00 PM