2010 YAMAHA GRIZZLY 450 Owners Manual

8-9
8
EBU23090Removing and installing panels The panels shown need to be removed to perform
some of the maintenance jobs described in this
chapter. Refer to this section each time a panel
needs to be removed and installed.
EBU27601Panels A and D
To remove one of the panels1. Remove the seat. (See page 4-18.)
2. Pull outward on the areas shown, and then
pull upward as shown.
1. Panel A
2. Panel B
1. Panel C
2. Panel D
3. Panel E
4. Panel F
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8To install one of the panels
1. Place the panel in its original position.
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8
2. Install the seat.Panel B
To remove the panel
Remove the bolt, and then take the panel off.
To install the panelPlace the panel in the original position and install
the bolt. NOTICE: When installing the panel, be
sure not to pinch the cables or wires.
[ECB00381]
Panel C
To remove the panel1. Remove the carrier top bolts.1. Panel B
2. Bolt
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82. Remove the carrier bolts under the fenders,
and then take the carrier off.3. Remove the quick fastener screws, and then
pull the panel upward to remove it.
1. Carrier bolt (top)
1
1
1
1. Carrier bolt (under the fenders)
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8 To install the panel
1. Place the panel in the original position, and
then install the quick fastener screws.
2. Place the carrier in the original position, and
then install the carrier bolts under the fenders.
3. Install the carrier top bolts, and then tighten all
bolts to the specified torques.Panel E
To remove the panel
Remove the bolts, and then take the panel off.
1. Quick fastener screw
2. Panel C
1
2
Tightening torques:
Carrier bolt (top):
34 Nm (3.4 m·kgf, 24 ft·lbf)
Carrier bolt (under fenders):
7 Nm (0.7 m·kgf, 5.1 ft·lbf)1. Panel E
2. Bolt
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8To install the panel
Place the panel in the original position and install
the bolts.
Panel F
To remove the panelPull outward on the areas shown.
To install the panelPlace the panel in its original position.
EBU23223Checking 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 accor-
dance with the periodic maintenance and lubrica-
tion 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 8-9.)
2. Remove the spark plug cap.
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8 3. Remove the spark plug as shown, with the
spark plug wrench included 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 medi-
um-to-light tan (the ideal color when the ATV
is ridden normally).
TIPIf the spark plug shows a distinctly different color,
the engine could be operating improperly. Do not
attempt to diagnose such problems yourself. In-
stead, have a Yamaha dealer check the ATV.
1. Spark plug cap
1. Spark plug wrench
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82. Check the spark plug for electrode erosion
and excessive carbon or other deposits, and
replace it if necessary.
3. Measure the spark plug gap with a wire thick-
ness gauge and, if necessary, adjust the gap
to specification.To install the spark plug
1. Clean the surface of the spark plug gasket
and its mating surface, and then wipe off any
grime from the spark plug threads.
2. Install the spark plug with the spark plug
wrench, and then tighten it to the specified
torque.
TIPIf a torque wrench is not available when installing
the spark plug, a good estimate of the correct
torque is 1/4–1/2 turn past finger tight. However,
the spark plug should be tightened to the specified
torque as soon as possible.3. Install the spark plug cap.
4. Install the panel. Specified spark plug:
NGK/DR8EA
1. Spark plug gapSpark plug gap:
0.6–0.7 mm (0.024–0.028 in)
Tightening torque:
Spark plug:
17.5 Nm (1.75 m·kgf, 12.7 ft·lbf)
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