2006 YAMAHA T135 maintenance

PERIODIC MAINTENANCE AND MINOR REPAIR
6-12
6
NOTE:The coolant should be between theminimum and maximum level marks.3. If the coolant is at or below the minimum level mark, remove cowl-
ing A. (See page 6-5.)
4. Loosen the coolant reservoir cap retainer bolt, and then lift the re-
tainer upward.
5. Remove the coolant reservoir cap, and then add coolant to the maxi-
mum level mark.
CAUTION:
ECA10470

use only YAMAHA GENUINE
COLANT. Using coolan other than
recommended, could cause damage
to oil seal and o-rings, as whell
as to the cooling system.
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.


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 ofthe coolant will be reduced.WARNING
EWA10380
Never attempt to remove the radiatorcap when the engine is hot.
6. Install the coolant reservoir cap.
7. Place the coolant reservoir cap re- tainer in the original position, and
then tighten the bolt to the speci-
fied torque.
8. Install the cowling.
1. Maximum level mark
2. Minimum level mark
1. Coolant reservoir cap retainer bolt
2. Coolant reservoir cap retainer
3. Coolant reservoir capCoolant reservoir capacity (maximum
level): YAMAHA GENUINE COOLANT
0.28 L (0.30 US qt) (0.25 Imp.qt)
Tightening torque:Coolant reservoir cap retainer bolt: 7.0 Nm (0.7 m ·kgf, 5.1 ft ·lbf)
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-13
6
NOTE:

The radiator fan is automatically
switched on or off according to the
coolant temperature in the radia-
tor.


If the engine overheats, see page6-36 for further instructions.
EAU33030
Changing the coolant
WARNING
EWA10380
Never attempt to remove the radiatorcap when the engine is hot.
The coolant must be changed at the in-
tervals specified in the periodic mainte-
nance and lubrication chart. Have a
Yamaha dealer change the coolant.
EAU37661
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 panel A. (See page 6-5.)
2. Remove the air filter case cover by
removing the screws and clamp,
and then pull the air filter element
out.3. 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. Air filter case cover
2. Screw
3. Clamp
1. Air filter element
1. Air filter element
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-14
6 4. Insert the air filter element into the
air filter case.
CAUTION:
ECA10480


Make sure that the air filter ele-
ment is properly seated in the
air filter case.


The engine should never be op-
erated without the air filter ele-
ment installed, otherwise the
piston(s) and/or cylinder(s) maybecome excessively worn.
5. Install the air filter case cover by in-
stalling the clamp and screws.
NOTE:

Make sure that the carburetor air
vent hose is routed as shown.


If dust or water collects in the air fil-
ter check hose, remove the clamp
from it, and then remove the plugto drain the hose.
6. Install the panel.
EAU21280
Adjusting the carburetor The carburetor is an important part of
the engine and requires 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 ser-
viced by the owner as part of routine
maintenance.CAUTION:
ECA10550
The carburetor has been set and ex-
tensively tested at the Yamaha fac-
tory. Changing these settings
without sufficient technical knowl-
edge may result in poor perfor-mance of or damage to the engine.
1. Carburetor air vent hose
1. Air filter check hose
2. Clamp
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-15
6
EAU37520
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.NOTE:

The engine is warm when it quickly
responds to the throttle.


A diagnostic tachometer is neededto make this adjustment.
1. Remove cowling B. (See page
6-5.)
2. Attach the diagnostic tachometer
to the spark plug lead.
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 en-
gine idling speed, turn the screw in
direction (b).
NOTE:
If the specified idling speed cannot be
obtained as described above, have aYamaha dealer make the adjustment.
4. Install the cowling.
EAU21370
Adjusting the throttle cable
free play The throttle cable free play should mea-
sure 3.0–7.0 mm (0.12–0.28 in) at the
throttle grip. Periodically check the
throttle cable free play and, if neces-
sary, adjust it as follows.NOTE:The engine idling speed must be cor-
rectly adjusted before checking and ad-justing the throttle cable free play.
1. Loosen the locknut.
1. Throttle stop screwEngine idling speed:
1300–1500 r/min
1. Throttle cable free play
2. Locknut
3. Adjusting nut
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-16
6 2. To increase the throttle cable free
play, turn the adjusting nut in direc-
tion (a). To decrease the throttle
cable free play, turn the adjusting
nut in direction (b).
3. Tighten the locknut.
EAU21401
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.
EAU21571
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.
WARNING
EWA10500


The tire air pressure must be
checked and adjusted on cold
tires (i.e., when the temperature
of the tires equals the ambient
temperature).


The tire air pressure must be ad-
justed in accordance with the
riding speed and with the total
weight of rider, passenger, car-
go, and accessories approvedfor this model.
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-17
6
WARNING
EWA10530
Proper loading of your motorcycle is
important for several characteristics
of your motorcycle; such as han-
dling, braking, performance and
safety. Do not carry loosely packed
items that can shift. Securely pack
your heaviest items close to the cen-
ter of the motorcycle, and distribute
the weight evenly from side to side.
Check the condition and pressure of
your tires. NEVER OVERLOAD
YOUR MOTORCYCLE. Make surethe total weight of the cargo, rider,
passenger, and accessories (fairing,
saddlebags, etc. if approved for this
model) does not exceed the maxi-
mum load of the motorcycle. Opera-
tion of an overloaded motorcycle
could cause tire damage, an acci-
dent, or even injury.
Tire inspection
The tires must be checked before each
ride. If the tire shows crosswise lines
(minimum tread depth), if the tire has a
nail or glass fragments in it, or if the
sidewall is cracked, have a Yamaha
dealer replace the tire immediately.
NOTE:
The tire tread depth limits may differ
from country to country. Always complywith the local regulations.
Tire information
This motorcycle is equipped with tube
tires.
WARNING
EWA10460


The front and rear tires should
be of the same make and de-
sign, otherwise the handling
characteristics of the vehicle
cannot be guaranteed.


After extensive tests, only the
tires listed below have been ap-
proved for this model byYamaha Motor Co., Ltd.
Tire air pressure (measured on cold
tires):
0–90 kg (0–198 lb):
Front:
200 kPa (29 psi) (2.00 kgf/cm²)
Rear:
225 kPa (33 psi) (2.25 kgf/cm²)
90–110 kg (198–243 lb):
Front:
200 kPa (29 psi) (2.00 kgf/cm²)
Rear:
225 kPa (33 psi) (2.25 kgf/cm²)
Maximum load*:
110 kg (243 lb)
* Total weight of rider, passenger, car-
go and accessories
1. Tire sidewall
2. Tire wear indicator
3. Tire tread depth
Minimum tire tread depth (front and
rear):
1.0 mm (0.04 in)
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-18
6
WARNING
EWA10560


It is dangerous to ride with a
worn-out tire. When a tire tread
begins to show crosswise lines,
have a Yamaha dealer replace
the tire immediately.


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.


It is not recommended to patch
a punctured tube. If unavoid-
able, however, patch the tube very carefully and replace it as
soon as possible with a high-
quality product.
EAU21940
Spoke wheels To maximize the performance, durabil-
ity, and safe operation of your motor-
cycle, note the following points
regarding the specified wheels.

The wheel rims should be checked
for cracks, bends or warpage, and
the spokes for looseness or dam-
age before each ride. If any dam-
age is found, have a Yamaha
dealer replace the wheel. Do not
attempt even the smallest repair to
the wheel. A deformed or cracked
wheel must be replaced.


The wheel should be balanced
whenever either the tire or wheel
has been changed or replaced. An
unbalanced wheel can result in
poor performance, adverse han-
dling characteristics, and a short-
ened tire life.


Ride at moderate speeds after
changing a tire since the tire sur-
face must first be
“broken in ” for it
to develop its optimal characteris-
tics.
Front tire: Size:
70/90-17M/C 38
P

Manufacturer/model:IRC/NF63B
DUNLOP/ D 102 FA
Rear tire:
Size:80/90-17M/C 44P
Manufacturer/model:
IRC/NR78Y
DUNLOP/ D 102 A
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-19
6
EAU37910
Checking the brake lever free
play There should be no free play at the
brake lever end. If there is free play,
have a Yamaha dealer inspect the
brake system.
WARNING
EWA14210
A soft or spongy feeling in the brake
lever can indicate the presence of air
in the hydraulic system. If there is air
in the hydraulic system, have a
Yamaha dealer bleed the system be-
fore operating the motorcycle. Air in
the hydraulic system will diminish
the braking performance, which may
result in loss of control and an acci-dent.
EAU22181
Adjusting the brake pedal free
play The brake pedal free play should mea-
sure 25.0–35.0 mm (0.98–1.38 in) at
the brake pedal end as shown. Period-
ically check the brake pedal free play
and, if necessary, adjust it as follows.
To increase the brake pedal free play,
turn the adjusting nut in direction (a). To
decrease the brake pedal free play,
turn the adjusting nut in direction (b).
WARNING
EWA10680


After adjusting the drive chain
slack or removing and installing
the rear wheel, always check the
brake pedal free play.


If proper adjustment cannot be
obtained as described, have a
Yamaha dealer make this ad-
justment.


After adjusting the brake pedal
free play, check the operation ofthe brake light.
1. Brake pedal free play
1. Brake pedal free play adjusting nut
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