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PERIODIC MAINTENANCE AND MINOR REPAIR
6-7
62. Disengage the cowling by sliding it
forward (for A) or backward (for B),
then pulling it outward.To install
1. Fit the slots and projections at the
rear bottom of the cowlings togeth-
er and slide the cowling into place.2. Place the cowling in its original po-
sition. Make sure that the tabs at
the front of the cowlings fit side by
side as shown and that all slots
and projections fit together.
3. Install the screws.
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 CTo remove
Remove the screws.To install
Place the panel in the original position
and install the screws.1. Screw (´ 2)
1. Projection
2. Slot
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Page 59 of 111
PERIODIC MAINTENANCE AND MINOR REPAIR
6-9
6
EAU01639
Spark plug inspectionThe spark plug is an important engine
component and should be inspected
periodically, preferably by a Yamaha
dealer. The condition of the spark plug
can indicate the condition of the en-
gine.
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 distinctly
different 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. The spark
plugs should be periodically removed
and inspected because heat and de-
posits will cause any spark plug to
slowly break down and erode. If elec-
trode erosion becomes excessive, or if
carbon and other deposits are exces-
sive, the spark plug should be replaced
with the specified plug.
Before installing any spark plug, mea-
sure the electrode gap with a wire
thickness gauge and adjust it to specifi-
cation.When installing a spark plug, the gas-
ket surface should always be cleaned
and a new gasket used. Any grime
should be wiped off from the threads
and the spark plug tightened to the
specified torque.
NOTE:@ If a torque wrench is not available when
installing a spark plug, a good estimate
of the correct torque is 1/4 to 1/2 turn
past finger tight. The spark plug should
be tightened to the specified torque as
soon as possible. @
a. Spark plug gap
Specified spark plug:
CR10EK (NGK)
Spark plug gap:
0.6 ~ 0.7 mm
Tightening torque:
Spark plug:
12.5 Nm (1.25 m·kg)
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-10
6
ECA00021
CAUTION:@ Do not use any type of tools to re-
move or install the cap as the igni-
tion coil coupler may get damaged.
The spark plug cap may be difficult
to remove because a rubber seal on
the end of the cap is tightly fit into
the cylinder bore. To remove the
cap, simply twist it back and forth
while pulling it upward; when install-
ing the cap, twist it back and forth
while pushing it downward. @
EAU01610*
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 sev-
eral 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. Stop the engine and remove the
dipstick.NOTE:@ Wait a few minutes until the oil level
settles before checking. @3. The oil level should be between
maximum and minimum marks on
the dipstick. If the level is low, fill
the engine with sufficient oil to
reach the specified level.
1. Dipstick
1. Maximum level mark
2. Minimum level mark
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Page 61 of 111
PERIODIC MAINTENANCE AND MINOR REPAIR
6-11
6Engine oil and oil filter cartridge re-
placement
1. Remove cowling B. (See page 6-6
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
engine oil filler cap.4. Remove the drain bolt and drain
the oil.
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.
1. Engine oil filler cap
1. Engine oil drain bolt
1. Oil filter wrench
2. Oil filter cartridge
Tightening torque:
Drain bolt:
43 Nm (4.3 m·kg)
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-12
6 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.9. Fill the engine with sufficient oil to
reach the specified level. Install
the engine oil filler cap and tighten
it.
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.
@
1. O-ring
1. Torque wrenchTightening torque:
Oil filter:
17 Nm (1.7 m·kg)
Recommended oil:
See page 8-1.
Oil quantity:
Total amount:
3.5 L
Periodic oil change:
2.5 L
With oil filter replacement:
2.7 L
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-13
610. 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.
11. 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. @12. Install the cowling.
EAU01611
Cooling system1. Check the coolant level in the res-
ervoir tank when the engine is cold
as the coolant level will vary with
engine temperature. The coolant
level should be between the maxi-
mum and minimum marks.2. If the level is low, remove the res-
ervoir tank cover by removing the
bolts.
3. Add coolant or distilled water to
raise it to the specified level.
4. Install the reservoir tank cover and
bolts.1. Maximum level mark
2. Minimum level mark
1. Bolt (´ 2)
Reservoir tank capacity:
0.44 L
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-14
6
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:@ If water is added, have a Yamaha deal-
er check the antifreeze content of the
coolant as soon as possible.
The radiator fan operation is complete-
ly automatic. It is switched on or off ac-
cording to the coolant temperature in
the radiator. @5. If your motorcycle overheats, see
page 6-42 for details.
EAU01612
Changing the coolant1. Remove panel C, cowling A and
cowling B. (See page 6-6 for re-
moval and installation proce-
dures.)
2. Place a container under the en-
gine.
3. Remove the radiator cap.4. Remove the water pump drain bolt
and drain the coolant from the wa-
ter pump housing.
5. Disconnect the radiator hose by
loosening the clamp and drain the
coolant completely.
6. Thoroughly flush the cooling sys-
tem with clean tap water.1. Radiator cap
1. Water pump drain bolt
2. Clamp bolt
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