Page 54 of 103
PERIODIC MAINTENANCE AND MINOR REPAIR
6-6
6 To install
Place in the original position and install
the screws.
EAU00483
Cowling CTo remove
Remove the bolts shown and discon-
nect the turn signal leads.To install
Place in the original position, install the
bolts and connect the turn signal leads.1. Cowling C
2. Bolt (´ 14)
1. Turn signal lead (´ 2)
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-7
6
EAU01668*
Spark plugsRemoval
1. Remove cowlings A and C. (See
pages 6-5 and 6-6 for removal and
installation procedures.)
2. Remove the spark plug caps.3. Use the spark plug wrench in the
tool kit to remove the spark plugs
as shown.
Inspection
The spark plug is an important engine
component and is easy to inspect. The
condition of the spark plug can indicate
the condition of the engine.
Normally, all spark plugs from the
same engine should have the same
color on the white insulator around the
center electrode. The ideal color at this
point is a medium-to-light tan color for a
motorcycle that is being ridden normal-
ly. If one spark plug shows a distinctlydifferent color, there could be some-
thing wrong with the engine.
Do not attempt to diagnose such prob-
lems yourself. Instead, take the motor-
cycle to a Yamaha dealer. You should
periodically remove and inspect the
spark plugs because heat and deposits
will cause any spark plug to slowly
break down and erode. If electrode ero-
sion becomes excessive, or if carbon
and other deposits are excessive, you
should replace the spark plug with the
specified plug.1. Spark plug cap (´ 4)
1. Spark plug wrench
Specified spark plug:
DR8EA (NGK)
X24ESR-U (DENSO)
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-8
6 Installation
1. Measure the electrode gap with a
wire thickness gauge and, if nec-
essary, adjust the gap to specifica-
tion.
2. Clean the gasket surface. Wipe off
any grime from the threads.
3. Install the spark plugs and tighten
them to the specified torque.
NOTE:@ If a torque wrench is not available when
you are installing a spark plug, a good
estimate of the correct torque is 1/4 to
1/2 turn past finger tight. Have the
spark plug tightened to the specified
torque as soon as possible. @4. Install the spark plug caps.
5. Install the cowlings.
a. Spark plug gapSpark plug gap:
0.6 ~ 0.7 mm
Tightening torque:
Spark plug:
18 Nm (1.8 m·kg)
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-9
6
EAU01765*
Engine oilOil level inspection
1. Place the motorcycle on a level
place and hold it in an upright posi-
tion. Warm up the engine for seve-
ral minutes.NOTE:@ Be sure the motorcycle is positioned
straight up when checking the oil level.
A slight tilt toward the side can result in
false readings. @
2. With the engine stopped, check
the oil level through the level win-
dow located at the lower part of
the right side crankcase cover.NOTE:@ Wait a few minutes until the oil level
settles before checking. @3. The oil level should be between
maximum and minimum marks. If
the level is low, fill the engine with
sufficient oil to reach the specified
level.Engine oil and oil filter cartridge re-
placement
1. Remove cowling A. (See page 6-5
for removal and installation proce-
dures.)
2. Warm up the engine for several
minutes.
3. Stop the engine. Place an oil pan
under the engine and remove the
oil filler cap.
4. Remove the drain bolt and drain
the oil.
1. Oil level window
2. Maximum level mark
3. Minimum level mark
1. Engine oil filler cap
1. Engine oil drain boltLeft side view
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-10
6 5. Remove the oil filter by using an oil
filter wrench.
NOTE:@ An oil filter wrench is available at a
nearby Yamaha dealer. @6. Reinstall the drain bolt and tighten
it to the specified torque.7. Apply a light coat of engine oil to
the O-ring of the new oil filter.
NOTE:@ Make sure the O-ring is seated proper-
ly. @
8. Install the oil filter and tighten it to
the specified torque with an oil fil-
ter wrench.NOTE:When installing the oil filter, tighten it to
the proper torque by using a torque
wrench.9. Fill the engine with sufficient oil to
reach the specified level. Install
the oil filler cap and tighten it.
1. Oil filter
2. Oil filter wrenchTightening torque:
Drain bolt:
43 Nm (4.3 m·kg)
1. O-ring
1. Torque wrenchTightening torque:
Oil filter:
17 Nm (1.7 m·kg)
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-11
6
EC000066
CAUTION:@ l
Do not put in any chemical addi-
tives. Engine oil also lubricates
the clutch and additives could
cause clutch slippage.
l
Be sure no foreign material en-
ters the crankcase.
@
10. Start the engine and warm it up for
several minutes. While warming
up, check for oil leakage. If oil
leakage is found, stop the engine
immediately and check for the
cause.NOTE:@ After the engine is started, the oil level
indicator light should go off if the oil is at
the specified level. @
EC000067
CAUTION:@ If the indicator light flickers or re-
mains on, immediately stop the en-
gine and consult with a Yamaha
dealer. @11. Install the cowling stay and cowl-
ing.
EAU01594
CoolantCheck the coolant level in the reservoir
tank when the engine is cold. The cool-
ant level will vary with engine tempera-
ture. The coolant level is satisfactory if
it is between the minimum and maxi-
mum marks on the tank. If the coolant
level is at or below the minimum mark,
fill with tap water (soft water) to bring
the level up to the maximum mark.
Have a Yamaha dealer change the
coolant every two years. Recommended oil:
See page 8-1.
Oil quantity:
Total amount:
3.5 L
Periodic oil change:
3.0 L
With oil filter replacement:
3.2 L1. Maximum level mark
2. Minimum level mark
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-12
6
EW000067
WARNING
@ Do not remove the radiator cap
when the engine is hot. @
EC000080
CAUTION:@ Hard water or salt water is harmful
to the engine. You may use distilled
water if you can’t get soft water. @NOTE:@ The radiator fan operation is complete-
ly automatic. It is switched on or off ac-
cording to the coolant temperature in
the radiator. @
EAU01332
Air filterThe air filter should be cleaned at the
specified intervals. It should be cleaned
more frequently if you are riding in un-
usually wet or dusty areas.
1. Remove the seats.
2. Remove cowling B from each side.
(See page 6-5.)
3. Remove the bolts holding the fuel
tank.
4. Lift the fuel tank upward and posi-
tion it away from the air filter case.
(Do not remove the fuel hoses.)
EW000071
WA R N I N G
@ l
Support the fuel tank carefully
during this procedure.
l
Do not tilt the fuel tank too
much or pull it too hard because
the fuel hose connections may
become loose causing fuel
leakage.
@
Reservoir tank capacity:
0.23 L
1. Bolt (´ 2)
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-13
65. Remove the screw holding the air
filter case cover.
6. Pull out the air filter.7. Tap the air filter lightly to remove
most of the dust and dirt. Blow out
the remaining dirt with com-
pressed air as shown. If the air fil-
ter is damaged, replace it.
8. Reinstall by reversing the removal
procedure.
EC000082
CAUTION:@ l
Make sure the air filter is prop-
erly seated in the air filter case.
l
The engine should never be run
without the air filter installed.
Excessive piston and/or cylin-
der wear may result.
@
1. Screw
2. Air filter case cover
1. Air filter
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