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PERIODIC MAINTENANCE AND MINOR REPAIR
7-16
7 4. If the coolant is at or below the
minimum level mark, remove the
rider seat (See page 3-15 for rider
seat removal and installation pro-
cedures.), open the reservoir cap,
add coolant to the maximum level
mark, and then close the reservoir
cap and install the rider seat.
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. _5. Install the panel.
NOTE:_ l
The radiator fan is automatically
switched on or off according to the
coolant temperature in the radia-
tor.
l
If the engine overheats, see page
7-39 for further instructions.
_
1. Coolant reservoir cap
Coolant reservoir capacity:
0.84 L
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PERIODIC MAINTENANCE AND MINOR REPAIR
7-17
7
EAU03569*
Cleaning the air filter
elements The air filter elements should be
cleaned at the intervals specified in the
periodic maintenance and lubrication
chart. Clean the air filter elements more
frequently if you are riding in unusually
wet or dusty areas.
1. Remove cowlings A and B. (See
pages 7-6–7-8 for cowling removal
and installation procedures.)NOTE:@ Continue as follows for each air filter
element. @
2. Remove the air filter case by re-
moving the bolts.3. Loosen the air filter joint clamp
screw, and then pull the air filter
off.1. Air filter case
2. Bolt (´ 2)
1. Screw
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PERIODIC MAINTENANCE AND MINOR REPAIR
7-18
7 4. Remove the air filter case cover by
removing the bolts.5. Remove the air filter element by
removing the screws.6. 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.
1. Bolt (´ 5)
1. Air filter element
2. Screw (´ 2)
1. Air filter element
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PERIODIC MAINTENANCE AND MINOR REPAIR
7-19
77. Install the air filter element by fit-
ting the projection on the air filter
element into the holder in the air
filter case, then tightening the
screws.
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
pistons and/or cylinders may
become excessively worn.
@
8. Install the air filter case cover by
installing the bolts.
9. Install the air filter by pushing it
onto the air filter joint, then tighten-
ing the air filter joint clamp screw.
10. Install the air filter case by install-
ing the bolts.
11. Install the cowlings.NOTE:@ Make sure that the air filter case drain
hose is routed as shown. @
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. _
1. Air filter case drain hose
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PERIODIC MAINTENANCE AND MINOR REPAIR
7-20
7
EAU01168
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.NOTE:_ A diagnostic tachometer is needed to
make this adjustment. _1. Attach the tachometer to the spark
plug lead.
2. Start the engine and warm it up for
several minutes at 1,000–2,000 r/min
while occasionally revving it to 4,000–
5,000 r/min.NOTE:_ The engine is warm when it quickly re-
sponds to the throttle. _3. 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 screw
Engine idling speed:
950–1,050 r/min
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PERIODIC MAINTENANCE AND MINOR REPAIR
7-21
7
EAU00635
Adjusting the throttle cable
free play The throttle cable free play should
measure 4–6 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.
EAU03975
Tires To maximize the performance, durabil-
ity, and safe operation of your motor-
cycle, 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.
a. Throttle cable free playE_5jc.book Page 21 Monday, January 22, 2001 12:12 PM
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PERIODIC MAINTENANCE AND MINOR REPAIR
7-22
7
EWA00041
WARNING
_ Tire inflation pressure should be
checked and adjusted when the
temperature of the tire equals the
ambient air temperature. Tire infla-
tion pressure must be adjusted ac-
cording to total weight of cargo,
rider, passenger, and accessories
(cowling, side cases, etc.). _CE-21E
CE-07EEWA00042
WARNING
_ Proper loading of your motorcycle
is important for several characteris-
tics of your motorcycle, such as
handling, braking, performance and
safety. Do not carry loosely packed
items that can shift. Securely pack
your heaviest items close to the
center of the motorcycle, and dis-
tribute the weight evenly from side
to side. Properly adjust the suspen-
sion for your load, and check the
condition and pressure of your tires.
NEVER OVERLOAD YOUR MOTOR-
CYCLE. Make sure the total weight
of the cargo, rider, passenger, and
accessories (cowling, side cases,
etc. if approved for this model) does
not exceed the maximum load of the
motorcycle. Operation of an over-
loaded motorcycle could cause tire
damage, an accident, or even injury. _
Tire inspection
The tires must be checked before each
ride. If the center tread depth reaches
the specified limit, if the tire has a nail
or glass fragments in it, or if the side-
wall is cracked, have a Yamaha dealer
replace the tire immediately.CE-08ENOTE:_ The tire tread depth limits may differ
from country to country. Always comply
with the local regulations. _
Tire air pressure (measured on cold tires)
Load* Front Rear
Up to 90 kg250 kPa
(2.50 kgf/cm
2,
2.50 bar)250 kPa
(2.50 kgf/cm
2,
2.50 bar)
90 kg–maximum250 kPa
(2.50 kgf/cm
2,
2.50 bar)280 kPa
(2.80 kgf/cm
2,
2.80 bar)
Maximum load* 190 kg
* Total weight of rider, passenger, cargo and
accessories
1. Tire sidewall
a. Tire tread depthMinimum tire tread depth
(front and rear)1.6 mm
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PERIODIC MAINTENANCE AND MINOR REPAIR
7-23
7
EW000079
WARNING
_ l
Have a Yamaha dealer replace
excessively worn tires. Besides
being illegal, operating the
motorcycle with excessively
worn tires decreases riding sta-
bility and can lead to loss of
control.
l
The replacement of all wheel-
and brake-related parts, includ-
ing the tires, should be left to a
Yamaha dealer, who has the
necessary professional knowl-
edge and experience.
_
Tire information
This motorcycle is equipped with tube-
less tires, tire air valves and cast
wheels.
EW000132
WARNING
_ l
The front and rear tires should
be of the same make and de-
sign, otherwise the handling
characteristics of the motor-
cycle cannot be guaranteed.
l
After extensive tests, only the
tires listed below have been ap-
proved for this model by
Yamaha Motor Co., Ltd.
l
Always make sure that the valve
caps are securely installed to
prevent air pressure leakage.
l
Use only the tire valves and
valve cores listed below to
avoid tire deflation during a
ride.
_
1. Tire air valve
2. Tire air valve core
3. Tire air valve cap with seal
E_5jc.book Page 23 Monday, January 22, 2001 12:12 PM