2012 YAMAHA GRIZZLY 550 Owners Manual

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To install a panel
1. Place the panel in the original position, and
then install the bolt and quick fastener screw.
2. Install panels A and C. Panels F and G
To remove a panel
1. Remove the panel bolts, footboard bolt, and
footboard nut.
2. Pull the panel downward while pushing the projection.1. Panel F
2. Footboard nut
3. Footboard bolt
4. Panel bolt
5. Projection
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8To install a panel
1. Place the panel in the original position.
2. Install the bolts and nut, and then tighten themto the specified torques.1. Panel G
2. Footboard nut
3. Footboard bolt
4. Panel bolt
5. ProjectionU1HS60E0.book Page 17 Tuesday, April 26, 2011 7:53 PM

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Panel H
To remove the panel
1. Remove the seat. (See page 4-18.)
2. Remove the rear carrier by removing the
bolts.
Tightening torques:
Panel bolt:4.0 Nm (0.40 m· kgf, 2.9 ft·lbf)
Footboard nut: 4.0 Nm (0.40 m· kgf, 2.9 ft·lbf)1. Carrier bolt (under the fenders)
1. Rear carrier
2. Carrier bolt (upper)
1. Carrier bolt (lower)
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83. Remove the quick fasteners, and then push
inward on the areas shown.
To install the panel
1. Place the panel in the original position, and then install the quick fasteners. 2. Install the rear carrier by installing the bolts
and tightening them to the specified torques.
3. Install the seat.1. Panel H
2. Quick fastener
2
1
Tightening torques: Carrier bolt (upper):53 Nm (5.3 m ·kgf, 38 ft· lbf)
Carrier bolt (lower): 53 Nm (5.3 m ·kgf, 38 ft· lbf)
Carrier bolt (under the fenders): 7 Nm (0.7 m ·kgf, 5.1 ft· lbf)
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EBU28671Removing the radiator grills The radiator grills can be removed to access the
radiator for cleaning.
To remove a radiator grill
Remove the quick fastener, pull the radiator grill
outward at the top, and then pull it upward.
To install a radiator grill
Place the radiator grill in its original position, and
then install the quick fastener.
EBU23213Checking 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 plug1. Remove the spark plug cap.
1. Radiator grill
2. Quick fastener
21
1. Spark plug cap1
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82. 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.2. Check the spark plug for electrode erosionand 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.
1. Spark plug wrench
Specified spark plug:NGK/LMAR6A-9
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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.EBU27467Engine oil and oil filter cartridge The engine oil level should be checked before
each ride. In addition, the oil must be changed and
the oil filter cartridge replaced at the intervals spec-
ified in the periodic maintenance and lubrication
chart.
To check the engine oil level 1. Place the ATV on a level surface.
2. Check the engine oil level on a cold engine.
1. Spark plug gapSpark plug gap: 0.8 –0.9 mm (0.031– 0.035 in)
Tightening torque:
Spark plug:13 Nm (1.3 m ·kgf, 9.4 ft· lbf)
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TIPIf the engine was started before checking the oil
level, be sure to warm up the engine sufficiently,
and then wait at least 10 minutes until the oil settles
for an accurate reading.3. Remove the access cover by turning it coun-terclockwise.
4. Remove the engine oil dipstick, and then wipe it off with a clean rag. 5. Insert the dipstick completely into the oil filler
hole, and then remove it again to check the oil
level.
TIPThe engine oil should be between the minimum
and maximum level marks.
1. Access cover
1. Engine oil dipstick
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