2002 YAMAHA YZF-R6 Owners Manual

PERIODIC MAINTENANCE AND MINOR REPAIR
6-6
6
EAU03624
Removing and installing the
cowlings and panel The cowlings and panel shown above
need to be removed to perform some
of the maintenance jobs described in
this chapter. Refer to this section each
time a cowling or the panel needs to be
removed and installed.
EAU01602
Cowlings A and B
To remove one of the cowlingsRemove the screws, slide the cowling
forward (for A) or backward (for B), and
then pull it off as shown.
1. Cowling A (right side)
Cowling B (left side)
2. Panel A
1. Screw (× 5)
2. Cowling ARight side
1. Screw (× 6)
2. Cowling BLeft side
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-7
6To install the cowling
1. Fit the slots and projections at the
rear bottom of each cowling to-
gether, and then slide the cowling
into place.2. Place the cowling in the original
position, and then install the
screws.
NOTE:@ Make sure that the tabs at the front of
each cowling fit side by side as shown
and that all slots and projections fit
together. @
1. Cowling A
2. Cowling B
1. Slot (× 2)
2. Projection (× 2)
1. Tab (× 2)
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-8
6
EAU01315
Panel A
To remove the panelRemove the screws, and then take the
panel off.To install the panel
Place the panel in the original position,
and then install the screws.
EAU01639
Checking the spark plugs The spark plugs are important engine
components, which should be checked
periodically, preferably by a Yamaha
dealer. Since heat and deposits will
cause any spark plug to slowly erode,
they should be removed and checked
in accordance with the periodic mainte-
nance and lubrication chart. In addition,
the condition of the spark plugs can re-
veal the condition of the engine.
The porcelain insulator around the cen-
ter electrode of each spark plug should
be a medium-to-light tan (the ideal col-
or when the motorcycle is ridden nor-
mally), and all spark plugs installed in
the engine should have the same color.
If any spark plug shows a distinctly dif-
ferent color, the engine could be defec-
tive. Do not attempt to diagnose such
problems yourself. Instead, have a
Yamaha dealer check the motorcycle.
If a spark plug shows signs of electrode
erosion and excessive carbon or other
deposits, it should be replaced.
1. Screw (× 2)
1. Projection
2. Slot
Specified spark plug:
CR10EK (NGK)
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-9
6Before installing a spark plug, the spark
plug gap should be measured with a
wire thickness gauge and, if necessary,
adjusted to specification.
Clean the surface of the spark plug
gasket and its mating surface, and then
wipe off any grime from the spark plug
threads.
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 speci-
fied torque as soon as possible. @
ECA00021
CAUTION:@ Do not use any tools to remove or
install the spark plug cap, otherwise
the ignition coil coupler may get
damaged. The spark plug cap may
be difficult to remove because the
rubber seal on the end of the cap fits
tightly. To remove the spark plug
cap, simply twist it back and forth
while pulling it out; to install it, twist
it back and forth while pushing it in. @
EAU04224
Engine 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 car-
tridge replaced at the intervals speci-
fied in the periodic maintenance and
lubrication chart.
To check the engine oil level
1. Place the motorcycle on a level
surface and hold it in an upright
position.NOTE:_ Make sure that the motorcycle is posi-
tioned straight up when checking the oil
level. A slight tilt to the side can result in
a false reading. _
a. Spark plug gapSpark plug gap:
0.6–0.7 mm
Tightening torque:
Spark plug:
12.5 Nm (1.25 m·kgf)
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-10
6 2. Start the engine, warm it up for
several minutes, and then turn it
off.
3. Wait a few minutes until the oil set-
tles, remove the oil filler cap, wipe
the dipstick clean, insert it back
into the oil filler hole (without
screwing it in), and then remove it
again to check the oil level.
NOTE:_ The engine oil should be between the
minimum and maximum level marks. _4. If the engine oil is below the mini-
mum level mark, add sufficient oil
of the recommended type to raise
it to the correct level.
5. Insert the dipstick into the oil filler
hole, and then tighten the oil filler
cap.To change the engine oil (with or
without oil filter cartridge replace-
ment)
1. Remove cowlings A and B. (See
page 6-6 for cowling removal and
installation procedures.)
2. Start the engine, warm it up for
several minutes, and then turn it
off.
3. Place an oil pan under the engine
to collect the used oil.
1. Engine oil filler capRight side
1. Maximum level mark
2. Minimum level mark
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-11
64. Remove the engine oil filler cap
and drain bolt to drain the oil from
the crankcase.
NOTE:_ Skip steps 5–7 if the oil filter cartridge is
not being replaced. _
5. Remove the oil filter cartridge with
an oil filter wrench.NOTE:_ An oil filter wrench is available at a
Yamaha dealer. _
6. Apply a thin coat of engine oil to
the O-ring of the new oil filter car-
tridge.NOTE:_ Make sure that the O-ring is properly
seated. _
1. Engine oil drain boltLeft side
1. Oil filter wrench
2. Oil filter cartridgeLeft side
1. O-ring
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-12
6 7. Install the new oil filter cartridge
with an oil filter wrench, and then
tighten it to the specified torque
with a torque wrench.
8. Install the engine oil drain bolt, and
then tighten it to the specified
torque.9. Add the specified amount of the
recommended engine oil, and
then install and tighten the oil filler
cap.
ECA00105
CAUTION:_

In order to prevent clutch slip-
page (since the engine oil also
lubricates the clutch), do not
mix any chemical additives with
the oil or use oils of grade “CD”
or higher. In addition, do not
use oils labeled “ENERGY CON-
SERVING II” or higher.


Make sure that no foreign mate-
rial enters the crankcase.
_10. Start the engine, and then let it idle
for several minutes while checking
it for oil leakage. If oil is leaking,
immediately turn the engine off
and check for the cause.NOTE:_ After the engine is started, the engine
oil level warning light should go off if the
oil level is sufficient. _
EC000067
CAUTION:_ If the oil level warning light flickers
or remains on, immediately turn the
engine off and have a Yamaha deal-
er check the vehicle. _11. Turn the engine off, and then
check the oil level and correct it if
necessary.
12. Install the cowlings.
1. Torque wrench
Tightening torque:
Oil filter cartridge:
17 Nm (1.7 m·kgf)
Tightening torque:
Engine oil drain bolt:
43 Nm (4.3 m·kgf)Left side
Recommended engine oil:
See page 8-1.
Oil quantity:
Without oil filter cartridge
replacement:
2.5 L
With oil filter cartridge
replacement:
2.7 L
Total amount (dry engine):
3.5 L
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-13
6
EAU04227
Coolant The coolant level should be checked
before each ride. In addition, the cool-
ant must be changed at the intervals
specified in the periodic maintenance
and lubrication chart.
To check the coolant level
1. Place the motorcycle on a level
surface and hold it in an upright
position.NOTE:_

The coolant level must be checked
on a cold engine since the level
varies with engine temperature.


Make sure that the motorcycle is
positioned straight up when
checking the coolant level. A slight
tilt to the side can result in a false
reading.
_
2. Check the coolant level in the
coolant reservoir.NOTE:_ The coolant should be between the
minimum and maximum level marks. _
3. If the coolant is at or below the
minimum level mark, remove the
coolant reservoir cover by remov-
ing the bolts, open the reservoir
cap, and then add coolant to the
maximum level mark.
1. Maximum level mark
2. Minimum level markLeft side
1. Bolt (× 2)
Coolant reservoir capacity:
0.44 LLeft side
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