2007 YAMAHA GRIZZLY 660 Owners Manual

8-13
8 To install the panel
Place the panel in its original position.Panel G
To remove the panel
1. Remove the seat. (See page 4-18.)
2. Remove the rear carrier by removing the
bolts.
1. Panel F
1. Carrier bolt (top)
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83. Remove the seat under bracket and the panel
by pulling them off.
To install the panel
1. Place the panel and the seat under bracket in
the original position.
2. Install the rear carrier by installing the bolts
and tightening them to the specified torques.
3. Install the seat.
1. Carrier bolt (under the fenders)
1. Seat under bracket
2. Panel GTightening torques:
Carrier bolt (top):
26 Nm (2.6 m·kgf, 19 ft·lbf)
Carrier bolt (under fenders):
7 Nm (0.7 m·kgf, 5.1 ft·lbf)
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8
EBU23221Checking 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 8-8.)
2. Remove the spark plug cap.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).
NOTE:If 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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8-16
82. Check the spark plug for electrode erosion
and excessive carbon or other deposits, and
replace it if necessary.
To install the spark plug
1. Measure the spark plug gap with a wire thick-
ness gauge and, if necessary, adjust the gap
to specification.
2. Clean the surface of the spark plug gasket
and its mating surface, and then wipe off any
grime from the spark plug threads.
3. Install the spark plug with the spark plug
wrench, and then tighten it to the specified
torque. Specified spark plug:
NGK/DPR8EA-9
Spark plug gap:
0.8–0.9 mm (0.031–0.035 in)
1. Spark plug gapTightening torque:
Spark plug:
17.5 Nm (1.75 m·kgf, 12.7 ft·lbf)
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8
NOTE:If a torque wrench is not available when installing
a 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 assoon as possible.
4. Install the spark plug cap.
5. Install the panel.EBU23321Engine 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. Remove panel F. (See page 8-8.)
2. Place the ATV on a level surface.
3. Start the engine, warm it up for several min-
utes, and then turn it off.
4. Wait a few minutes until the oil settles before
checking.
5. Remove the engine oil filler cap, and then
wipe the dipstick off with a clean rag.6. Insert the dipstick into the filler hole (without
screwing it in), and then remove it again to
check the oil level.
1. Engine oil filler cap
2. Dipstick
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8
NOTE:The engine oil should be between the minimumand maximum level marks.
7. If the engine oil is at or below the minimum
level mark, add sufficient oil of the recom-
mended type to raise it to the correct level.
8. Insert the dipstick into the oil filler hole, and
then tighten the engine oil filler cap.
9. Install the panel.To change the engine oil (with or without oil fil-
ter cartridge replacement)
1. Remove panel F. (See page 8-8.)
2. Place the ATV on a level surface.
3. Start the engine, warm it up for several min-
utes, and then turn it off.
4. Place an oil pan under the engine to collect
the used oil.
5. Remove the engine oil filler cap, and then re-
move the engine oil drain bolt to drain the oil
from the crankcase.1. Maximum level mark
2. Minimum level mark
1. Engine oil drain bolt
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8
NOTE:Skip steps 6–10 if the oil filter cartridge is not beingreplaced.
6. Remove panels D and E. (See page 8-8.)
7. Remove the oil filter cartridge with an oil filter
wrench.NOTE:An oil filter wrench is available at a nearby Yamahadealer.
8. Apply a thin coat of engine oil to the O-ring of
the new oil filter cartridge.
NOTE:Make sure that the O-ring is properly seated.
9. Install the new oil filter cartridge with an oil fil-
ter wrench, and then tighten it to the specified
torque with a torque wrench.
1. Oil filter cartridge
2. Oil filter wrench
1. O-ring
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8
10. Install panels D and E.
11. Install the engine oil drain bolt, and then tight-
en it to the specified torque.12. Add the specified amount of the recommend-
ed engine oil, and then install and tighten the
engine oil filler cap.
CAUTION:ECB00300
In order to prevent clutch slippage (since the
engine oil also lubricates the clutch), do not
mix any chemical additives. Do not use oils
with a diesel specification of “CD” or oils of
a higher quality than specified. In addition,
do not use oils labeled “ENERGY CONSERV-
ING II” or higher.
Make sure that no foreign material enters thecrankcase.
1. Torque wrenchTightening torque:
Oil filter cartridge:
17 Nm (1.7 m·kgf, 12 ft·lbf)
Tightening torque:
Engine oil drain bolt:
30 Nm (3.0 m·kgf, 22 ft·lbf)
Recommended oil:
See page 10-1.
Oil quantity:
Without oil filter cartridge replacement:
1.90 L (2.01 US qt) (1.67 Imp.qt)
With oil filter cartridge replacement:
2.00 L (2.11 US qt) (1.76 Imp.qt)
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