2006 YAMAHA T135 engine overheat

INSTRUMENT AND CONTROL FUNCTIONS
3-2
3
EAU11003
Indicator and warning lights
EAU11020
Turn signal indicator light “”
This indicator light flashes when the
turn signal switch is pushed to the left or
right.
EAU11060
Neutral indicator light “”
This indicator light comes on when the
transmission is in the neutral position.
EAU37611
Gear position indicator lights “1 ”
“ 2 ” “ 3 ”, and “4 ”
The respective indicator light comes on
when the transmission is in the 1st,
2nd, 3rd or 4th gear position.
EAU11080
High beam indicator light “”
This indicator light comes on when the
high beam of the headlight is switched
on.
EAU37631
Coolant temperature warning light
“”
This warning light comes on when the
engine overheats. When this occurs,
stop the engine immediately and allow
the engine to cool.
This warning light also has a self-diag-
nosis device function for various electri-
cal circuits.

When the main switch is turned to
“ ON ” and the engine is not run-
ning, the warning light will flash if
an electrical circuit is defective. If
this occurs, have a Yamaha dealer
check the vehicle.


When the engine is running, the
warning light will come on if the en-
gine overheats or if an electrical
circuit is defective.
To determine which of the above is
occurring, stop the vehicle when it
is safe to do so, then turn the main
switch to “OFF ”, and then back to
“ ON ”.
If the warning light stays on, this in-
dicates the engine is overheating.
Keep the engine turned off and al-
low it to cool.
CAUTION:
ECA10020
Do not operate the engine if it isoverheated.
If the warning light flashes, this in-
dicates there is a defective electri-
cal circuit. Have a Yamaha dealer
check the vehicle.
The electrical circuit of the warning light
can be checked by turning the key to
“ ON ”.
If the warning light does not come on
for a few seconds, then go off, have a
Yamaha dealer check the electrical cir- cuit.
1. Turn signal indicator light “”
2. Coolant temperature warning light “”
3. Neutral indicator light “”
4. Gear position indicator light “1” “2” “3” “4”
5. High beam indicator light “”U5YPE0E0.book Page 2 Wednesday, February 23, 2005 4:22 PM

OPERATION AND IMPORTANT RIDING POINTS
5-3
5


Be sure to fully close the throttle
grip when shifting.


Make sure the neutral indicator
light comes on when the trans-
mission is in the neutral posi-tion.
EAU16800
Tips for reducing fuel
consumption Fuel consumption depends largely on
your riding style. Consider the following
tips to reduce fuel consumption:

Turn the starter (choke) off as
soon as possible.


Shift up swiftly, and avoid high en-
gine speeds during acceleration.


Do not rev the engine while shifting
down, and avoid high engine
speeds with no load on the engine.


Turn the engine off instead of let-
ting it idle for an extended length of
time (e.g., in traffic jams, at traffic
lights or at railroad crossings).
EAU16830
Engine break-in There is never a more important period
in the life of your engine than the period
between 0 and 1000 km (600 mi). For
this reason, you should read the follow-
ing material carefully.
Since the engine is brand new, do not
put an excessive load on it for the first
1000 km (600 mi). The various parts in
the engine wear and polish themselves
to the correct operating clearances.
During this period, prolonged full-throt-
tle operation or any condition that might
result in engine overheating must be
avoided.
EAU37791
0–150 km (0–90 mi)
U5YPE0E0.book Page 3 Wednesday, February 23, 2005 4:22 PM

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
U5YPE0E0.book Page 13 Wednesday, February 23, 2005 4:22 PM

PERIODIC MAINTENANCE AND MINOR REPAIR
6-37
6Engine overheating
WARNING
EWA10400


Do not remove the radiator cap when the engine and radiator are hot. Scalding hot fluid and steam may be
blown out under pressure, which could cause serious injury. Be sure to wait until the engine has cooled.


After removing the radiator cap retaining bolt, place a thick rag, like a towel, over the radiator cap, and then
slowly rotate the cap counterclockwise to the detent to allow any residual pressure to escape. When the hissingsound has stopped, press down on the cap while turning it counterclockwise, and then remove the cap.
NOTE:If coolant is not available, tap water can be temporarily used instead, provided that it is changed to the recommended coolantas soon as possible.
Wait until the
engine has cooled.
Check the coolant level in the
reservoir and radiator.
The coolant level
is OK.The coolant level is low.
Check the cooling system
for leakage.
Have a Yamaha dealer checkand repair the cooling system.Add coolant. (See NOTE.)
Start the engine. If the engine overheats again,
have a
Yamaha dealer check
and repair the cooling system.
There is
leakage.
There is
no leakage.
U5YPE0E0.book Page 37 Wednesday, February 23, 2005 4:22 PM