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PERIODIC MAINTENANCE AND MINOR REPAIR
6-14
6
EAU03416
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.
If the engine overheats, see page 6-46
for further instructions.
To check the coolant level
1. Place the motorcycle on a level
surface and hold it in an upright
position.
2. Remove cowling A. (See page 6-6
for cowling removal and installa-
tion procedures.)
NOTE:@ l
The coolant level must be checked
on a cold engine since the level
varies with engine temperature.
l
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.
@3. Check the coolant level in the
coolant reservoir.NOTE:@ The coolant should be between the
minimum and maximum level marks. @4. If the coolant is at or below the
minimum level mark, remove the
coolant reservoir cap and add
coolant to the maximum level
mark.
5. Install the coolant reservoir cap
and the cowling.
1. Maximum level mark
2. Minimum level mark
Coolant reservoir capacity:
0.3 L
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-15
6
EC000080
CAUTION:@ l
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.
l
If water has been used instead
of coolant, replace it with cool-
ant as soon as possible, other-
wise the engine may not be
sufficiently cooled and the cool-
ing system will not be protected
against frost and corrosion.
l
If water has been added to the
coolant, have a Yamaha dealer
check the antifreeze content of
the coolant as soon as possible,
otherwise the effectiveness of
the coolant will be reduced.
@
EW000067
WARNING
@ Never attempt to remove the radia-
tor cap when the engine is hot. @
NOTE:@ The radiator fan is automatically
switched on or off according to the
coolant temperature in the radiator. If
the engine overheats, see page 6-46
for further instructions. @
EAU03417
To change the coolant
1. Place the motorcycle on a level
surface and let the engine cool if
necessary.
2. Remove cowling A and panel A.
(See pages 6-6 and 6-7 for cowl-
ing and panel removal and instal-
lation procedures.)
3. Place a container under the en-
gine to collect the used coolant.
E_3lr.book Page 15 Wednesday, November 22, 2000 4:10 PM
Page 59 of 110
PERIODIC MAINTENANCE AND MINOR REPAIR
6-16
6 4. Remove the radiator cap.
EW000067
WARNING
@ Never attempt to remove the radia-
tor cap when the engine is hot. @
5. Turn the coolant drain cock to
“ON”.6. Remove the water pump drain bolt
to drain the water pump housing.
1. Radiator cap
1. Coolant drain cock
2. Position indicator
1. Water pump drain bolt
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-17
67. Remove the cylinder drain plug
covers on the outside of the cylin-
der blocks by removing the
screws.8. Remove the rubber coolant drain
plugs to drain the coolant from the
engine.
9. After the coolant is completely
drained, thoroughly flush the cool-
ing system with clean tap water.
10. Install the water pump drain bolt,
and then tighten it to the specified
torque.
NOTE:@ Check the washer for damage and re-
place it if necessary. @
11. Install the rubber coolant drain
plugs, and then install the cylinder
drain plug covers.NOTE:@ Check the rubber plugs for damage
and replace them if necessary. @12. Turn the coolant drain cock to
“OFF”.
13. Pour the recommended coolant
into the reservoir to the maximum
level, and then install the cap.
14. Pour the recommended coolant
into the radiator until it is full.
1. Screw (´ 4)
1. Rubber coolant drain plug (´ 4)
Tightening torque:
Water pump drain bolt:
43 Nm (4.3 m·kg)
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PERIODIC MAINTENANCE AND MINOR REPAIR
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6
EC000080
CAUTION:@ l
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.
l
If water has been used instead
of coolant, replace it with cool-
ant as soon as possible, other-
wise the engine may not be
sufficiently cooled and the cool-
ing system will not be protected
against frost and corrosion.
l
If water has been added to the
coolant, have a Yamaha dealer
check the antifreeze content of
the coolant as soon as possible,
otherwise the effectiveness of
the coolant will be reduced.
@15. Install the radiator cap, start the
engine, let it idle for several min-
utes, and then turn it off.
16. 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.
17. 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.
18. Start the engine, and then check
the vehicle for coolant leakage. If
coolant is leaking, have a Yamaha
dealer check the cooling system.
19. Install the cowling and the panel. Antifreeze/water mixture ratio:
1:1
Recommended antifreeze:
High-quality ethylene glycol
antifreeze containing corrosion
inhibitors for aluminum engines
Coolant quantity:
Total amount:
3.05 L
Coolant reservoir capacity:
0.3 L
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PERIODIC MAINTENANCE AND MINOR REPAIR
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6
EAU01662
Cleaning the air filter element The air filter element should be cleaned
at the intervals specified in the periodic
maintenance and lubrication chart.
Clean the air filter element more fre-
quently if you are riding in unusually
wet or dusty areas.
1. Remove cowling A. (See page 6-6
for cowling removal and installa-
tion procedures.)
2. Remove the air filter case cover by
removing the screws.3. Pull the air filter element out.
4. Lightly tap the air filter element to
remove most of the dust and dirt,
and then blow the remaining dirt
out with compressed air as shown.
If the air filter element is damaged,
replace it.
5. Insert the air filter element into the
air filter case.
EC000082
CAUTION:@ l
Make sure that the air filter ele-
ment is properly seated in the
air filter case.
l
The engine should never be op-
erated without the air filter ele-
ment installed, otherwise the
piston(s) and/or cylinder(s) may
become excessively worn.
@6. Install the air filter case cover by
installing the screws.
7. Install the cowling.
1. Screw (´ 6)
1. Air filter element
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PERIODIC MAINTENANCE AND MINOR REPAIR
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6
EAU00630
Adjusting the carburetors The carburetors are important parts of
the engine and require very sophisti-
cated adjustment. Therefore, most car-
buretor adjustments should be left to a
Yamaha dealer, who has the neces-
sary professional knowledge and expe-
rience. The adjustment described in
the following section, however, may be
serviced by the owner as part of routine
maintenance.
EC000095
CAUTION:@ The carburetors have been set and
extensively tested at the Yamaha
factory. Changing these settings
without sufficient technical knowl-
edge may result in poor perfor-
mance of or damage to the engine. @
EAU00632
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.
1. Start the engine and warm it up for
several minutes at 1,000–
2,000 r/min while occasionally rev-
ving it to 4,000–5,000 r/min.NOTE:@ The engine is warm when it quickly re-
sponds to the throttle. @
2. Check the engine idling speed
and, if necessary, adjust it to spec-
ification by turning the throttle stop
screw. To increase the engine
idling speed, turn the screw in di-
rection
a. To decrease the engine
idling speed, turn the screw in di-
rection
b.NOTE:@ If the specified idling speed cannot be
obtained as described above, have a
Yamaha dealer make the adjustment. @ 1. Throttle stop screwEngine idling speed:
950–1,050 r/min
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PERIODIC MAINTENANCE AND MINOR REPAIR
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6
EAU00635
Adjusting the throttle cable
free play The throttle cable free play should
measure 3–5 mm at the throttle grip.
Periodically check the throttle cable
free play and, if necessary, have a
Yamaha dealer adjust it.
EAU00637
Adjusting the valve clearance The valve clearance changes with use,
resulting in improper air-fuel mixture
and/or engine noise. To prevent this
from occurring, the valve clearance
must be adjusted by a Yamaha dealer
at the intervals specified in the periodic
maintenance and lubrication chart.
EAU00647
Tires To ensure maximum performance as
well as the long and safe operation of
your motorcycle, note the following
points regarding the specified tires.
Tire air pressure
The tire air pressure should be
checked and, if necessary, adjusted
before each ride.
EW000082
WARNING
@ l
The tire air pressure must be
checked and adjusted on cold
tires (i.e., when the temperature
of the tires equals the ambient
temperature).
l
The tire air pressure must be
adjusted in accordance with the
riding speed and with the total
weight of rider, passenger, car-
go, and accessories approved
for this model.
@
a. Throttle cable free playE_3lr.book Page 21 Wednesday, November 22, 2000 4:10 PM