YAMAHA FZ6 NHG 2009 Workshop Manual

PERIODIC MAINTENANCE AND ADJUSTMENT
6-7
6
EAU18751
Removing and installing the
panel The panel shown needs to be removed
to perform some of the maintenance
jobs described in this chapter. Refer to
this section each time the panel needs
to be removed and installed.
EAU33020
Panel A
To remove the panel1. Remove the seat. (See page
3-19.)
2. Remove the bolt, and then pull the
panel off as shown.To install the panel
1. Place the panel in the original posi-
tion, and then install the bolt.
2. Install the seat.
EAU19642
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 color
when the vehicle is ridden normally),
and all spark plugs installed in the en-
gine should have the same color. If any
spark plug shows a distinctly different
color, the engine could be operating im-
properly. Do not attempt to diagnose
such problems yourself. Instead, have
a Yamaha dealer check the vehicle.
If a spark plug shows signs of electrode
erosion and excessive carbon or other
deposits, it should be replaced.
1. Panel A
1. Panel A
2. Bolt
Specified spark plug:
NGK/CR9EK
U5S5E2E0.book Page 7 Monday, August 4, 2008 2:07 PM

PERIODIC MAINTENANCE AND ADJUSTMENT
6-8
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.
TIPIf 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.
EAU32858
Engine oil and oil filter car-
tridge 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 vehicle on a level sur-
face and hold it in an upright posi-
tion. A slight tilt to the side can
result in a false reading.
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.
4. Remove the engine oil dipstick and
wipe it clean, insert it back into the
hole (without screwing it in), and
then remove it again to check the
oil level.
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)
U5S5E2E0.book Page 8 Monday, August 4, 2008 2:07 PM

PERIODIC MAINTENANCE AND ADJUSTMENT
6-9
6
TIPThe engine oil should be between theminimum and maximum level marks.
5. If the engine oil is at or below the
minimum level mark, remove the
oil filler cap, and then add sufficient
oil of the recommended type to
raise it to the correct level.6. Insert and tighten the engine oil
dipstick, and then install and tight-
en the oil filler cap.
To change the engine oil (with or
without oil filter cartridge replace-
ment)
1. Start the engine, warm it up for
several minutes, and then turn it
off.
2. Place an oil pan under the engine
to collect the used oil.
3. Remove the engine oil filler cap
and drain bolt to drain the oil from
the crankcase.
TIPSkip steps 4–6 if the oil filter cartridge isnot being replaced.
4. Remove the oil filter cartridge with
an oil filter wrench.
1. Engine oil dipstick
2. Maximum level mark
3. Minimum level mark
1. Engine oil filler cap
1. Engine oil drain bolt
1. Oil filter cartridge
2. Oil filter wrench
U5S5E2E0.book Page 9 Monday, August 4, 2008 2:07 PM

PERIODIC MAINTENANCE AND ADJUSTMENT
6-10
6
TIPAn oil filter wrench is available at aYamaha dealer.
5. Apply a thin coat of clean engine
oil to the O-ring of the new oil filter
cartridge.TIPMake sure that the O-ring is properlyseated.
6. Install the new oil filter cartridge
with an oil filter wrench, and then
tighten it to the specified torque
with a torque wrench.7. Install the engine oil drain bolt, and
then tighten it to the specified
torque.
TIPCheck the washer for damage and re-place it if necessary.8. Refill with the specified amount of
the recommended engine oil, and
then install and tighten the oil filler
cap.
TIPBe sure to wipe off spilled oil on any
parts after the engine and exhaust sys-tem have cooled down.NOTICE
ECA11620


In order to prevent clutch slip-
page (since the engine oil also
lubricates the clutch), do not
mix any chemical additives. Do
not use oils with a diesel speci-
fication of “CD” or oils of a high-
er quality than specified. In
1. O-ring
1. Torque wrenchTightening torque:
Oil filter cartridge:
17 Nm (1.7 m·kgf, 12 ft·lbf)
Tightening torque:
Engine oil drain bolt:
43 Nm (4.3 m·kgf, 31 ft·lbf)
Recommended engine oil:
See page 8-1.
Oil quantity:
Without oil filter cartridge replace-
ment:
2.50 L (2.64 US qt, 2.20 Imp.qt)
With oil filter cartridge replacement:
2.80 L (2.96 US qt, 2.46 Imp.qt)
U5S5E2E0.book Page 10 Monday, August 4, 2008 2:07 PM

PERIODIC MAINTENANCE AND ADJUSTMENT
6-11
6 addition, do not use oils labeled
“ENERGY CONSERVING II” or
higher.


Make sure that no foreign mate-rial enters the crankcase.
9. Start the engine, and then let it idle
for several minutes while checking
it for oil leakage. If oil is leaking, im-
mediately turn the engine off and
check for the cause.
TIPAfter the engine is started, the engine
oil level warning light should go off if theoil level is sufficient.
NOTICE
ECA10400
If the oil level warning light flickers
or remains on, immediately turn the
engine off and have a Yamaha dealercheck the vehicle.
10. Turn the engine off, and then
check the oil level and correct it if
necessary.
EAU20070
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.
EAU20092
To check the coolant level
1. Place the vehicle on a level sur-
face and hold it in an upright posi-
tion.TIP

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


Make sure that the vehicle is posi-
tioned straight up when checking
the coolant level. A slight tilt to theside can result in a false reading.
2. Check the coolant level in the cool-
ant reservoir.
TIPThe coolant should be between theminimum and maximum level marks.
1.“CD” specification
2.“ENERGY CONSERVING II”
1
2
U5S5E2E0.book Page 11 Monday, August 4, 2008 2:07 PM

PERIODIC MAINTENANCE AND ADJUSTMENT
6-12
63. If the coolant is at or below the
minimum level mark, remove the
reservoir cap.4. Add coolant to the maximum level
mark, and then install the reservoir
cap. WARNING! Remove only
the coolant reservoir cap. Never
attempt to remove the radiator
cap when the engine is hot.
[EWA15161]
NOTICE: If coolant is not
available, use distilled water or
soft tap water instead. Do not
use hard water or salt water
since it is harmful to the engine.
If water has been used instead
of coolant, replace it with cool-
ant as soon as possible, other-
wise the cooling system will not
be protected against frost and
corrosion. If water has been
added to the coolant, have a
Yamaha dealer check the anti-
freeze content of the coolant as
soon as possible, otherwise the
effectiveness of the coolant will
be reduced.
[ECA10472]EAU42611
To change the coolant
1. Place the vehicle on a level sur-
face and let the engine cool if nec-
essary.
2. Place a container under the engine
to collect the used coolant.
3. Remove the radiator cap retaining
bolt, radiator cap retainer and radi-
ator cap. WARNING! Never at-
tempt to remove the radiator
cap when the engine is hot.
[EWA10381]
4. Remove the coolant reservoir cap.
1. Coolant reservoir
2. Maximum level mark
3. Minimum level mark
1. Coolant reservoir cap
Coolant reservoir capacity (up to the
maximum level mark):
0.25 L (0.26 US qt, 0.22 Imp.qt)
1. Radiator cap retaining bolt
2. Radiator cap
3. Radiator cap retainer
U5S5E2E0.book Page 12 Monday, August 4, 2008 2:07 PM

PERIODIC MAINTENANCE AND ADJUSTMENT
6-13
6 5. Remove the coolant reservoir cov-
er and coolant reservoir by remov-
ing the bolts.
6. Drain the coolant from the coolant
reservoir by turning it upside down.7. Install the coolant reservoir and its
reservoir cover by placing them in
the original position, and then in-
stalling the bolts.
8. Remove the coolant drain bolt to
drain the cooling system.
9. After the coolant is completely
drained, thoroughly flush the cool-
ing system with clean tap water.
10. Install the coolant drain bolt, and
then tighten it to the specified
torque.
TIPCheck the washer for damage and re-place it if necessary.11. Pour the specified amount of the
recommended coolant into the ra-
diator and reservoir.
12. Install the coolant reservoir cap.
13. Install the radiator cap, radiator
cap retainer and radiator cap re-
taining bolt.
1. Coolant reservoir cap
2. Coolant reservoir
1. Coolant reservoir cover
2. Bolt
1. Coolant drain bolt
Tightening torque:
Coolant drain bolt:
10 Nm (1.0 m·kgf, 7.2 ft·lbf)
Antifreeze/water mixture ratio:
1:1
Recommended antifreeze:
High-quality ethylene glycol anti-
freeze containing corrosion inhibitors
for aluminum engines
Coolant quantity:
Radiator capacity (including all
routes):
2.00 L (2.11 US qt, 1.76 Imp.qt)
Coolant reservoir capacity (up to the
maximum level mark):
0.25 L (0.26 US qt, 0.22 Imp.qt)
U5S5E2E0.book Page 13 Monday, August 4, 2008 2:07 PM

PERIODIC MAINTENANCE AND ADJUSTMENT
6-14
614. Start the engine, let it idle for sev-
eral minutes, and then turn it off.
15. Remove the radiator cap to check
the coolant level in the radiator. If
necessary, add sufficient coolant
until it reaches the top of the radia-
tor, and then install the radiator
cap, radiator cap retainer and radi-
ator cap retaining bolt.
16. Check the coolant level in the res-
ervoir. If necessary, remove the
coolant reservoir cap, add coolant
to the maximum level mark, and
then install the cap.17. Start the engine, and then check
the vehicle for coolant leakage. If
coolant is leaking, have a Yamaha
dealer check the cooling system.
EAU34425
Replacing the air filter element The air filter element should be re-
placed at the intervals specified in the
periodic maintenance and lubrication
chart. Replace the air filter element
more frequently if you are riding in un-
usually wet or dusty areas.
1. Remove the seat. (See page
3-19.)
2. Remove the fuel tank bolts, and
then lift the fuel tank away from the
air filter case.
3. Remove the air filter case cover by
removing the screws. NOTICE:
When removing the air filter
1. Radiator cap retaining bolt
2. Radiator cap
3. Radiator cap retainer
1. Bolt
U5S5E2E0.book Page 14 Monday, August 4, 2008 2:07 PM

PERIODIC MAINTENANCE AND ADJUSTMENT
6-15
6 case cover, be careful not to al-
low foreign objects to drop into
the air intake manifold.
[ECA12881]
4. Pull the air filter element out.5. Insert a new air filter element into
the air filter case. NOTICE: Make
sure that the air filter element is
properly seated in the air filter
case. The engine should never
be operated without the air filter
element installed, otherwise the
piston(s) and/or cylinder(s) may
become excessively worn.
[ECA10481]
6. Install the air filter case cover by in-
stalling the screws.
7. Place the fuel tank in its original
position. Make sure that the fuel
hoses are properly connected and
routed, and are not pinched. Be
sure to place the hoses in their
original position. WARNING! Be-
fore placing the fuel tank in the
original position, make sure that
all hoses (i.e., fuel hose, fuel
tank breather hose, fuel tank
overflow hose) are not dam-
aged, that they are properly con-
nected and routed, and that they
are not pinched. If any hose is
damaged, have a Yamaha dealer
replace the hose before startingthe engine, otherwise fuel may
leak, creating a fire hazard.
[EWA12463]
8. Install the fuel tank bolts.
9. Install the seat.
1. Screw
2. Air filter case cover
1. Air filter element
2. Air intake manifold
1. Hose
1. Original position (paint mark)
U5S5E2E0.book Page 15 Monday, August 4, 2008 2:07 PM

PERIODIC MAINTENANCE AND ADJUSTMENT
6-16
6
EAU34301
Adjusting the engine idling
speed The engine idling speed must be
checked and, if necessary, adjusted as
follows at the intervals specified in the
periodic maintenance and lubrication
chart.
The engine should be warm before
making this adjustment.
Check the engine idling speed and, if
necessary, adjust it to specification by
turning the idle adjusting screw. To in-
crease the engine idling speed, turn the
screw in direction (a). To decrease the
engine idling speed, turn the screw in
direction (b).
TIPIf the specified idling speed cannot be
obtained as described above, have aYamaha dealer make the adjustment.
EAU21382
Checking the throttle cable
free play The throttle cable free play should mea-
sure 3.0–5.0 mm (0.12–0.20 in) at the
throttle grip. Periodically check the
throttle cable free play and, if neces-
sary, have a Yamaha dealer adjust it.
1. Idle adjusting screw
Engine idling speed:
1250–1350 r/min
1. Throttle cable free play
U5S5E2E0.book Page 16 Monday, August 4, 2008 2:07 PM