check engine YAMAHA T135 2006 Owners Manual

TABLE OF CONTENTSSAFETY INFORMATION ..................1-1
DESCRIPTION ..................................2-1
Left view ..........................................2-1
Right view ........................................2-2
Controls and instruments.................2-3
INSTRUMENT AND CONTROL
FUNCTIONS.......................................3-1
Main switch/steering lock ................3-1
Indicator and warning lights ............3-2
Speedometer unit ...........................3-3
Fuel gauge ......................................3-3
Handlebar switches ........................3-3
Shift pedal .......................................3-4
Brake lever .....................................3-4
Brake pedal ....................................3-5
Fuel tank cap ..................................3-5
Fuel .................................................3-6
Catalytic converter ..........................3-6
Starter (choke) lever ........................3-7
Kickstarter .......................................3-7
Seat ................................................3-7
Helmet holders ...............................3-8
Storage compartment .....................3-8
Sidestand ........................................3-9
PRE-OPERATION CHECKS..............4-1
Pre-operation check list ..................4-2OPERATION AND IMPORTANT
RIDING POINTS................................. 5-1
Starting and warming up a
cold engine ................................. 5-1
Starting a warm engine .................. 5-2
Shifting ........................................... 5-2
Tips for reducing fuel
consumption ............................... 5-3
Engine break-in .............................. 5-3
Parking ........................................... 5-5
General note .................................. 5-6
PERIODIC MAINTENANCE AND
MINOR REPAIR................................. 6-1
Owner’s tool kit ............................... 6-1
Periodic maintenance and
lubrication chart .......................... 6-2
Removing and installing the
cowlings and panel ..................... 6-5
Checking the spark plug ................. 6-7
Engine oil and oil filter element ...... 6-9
Coolant ......................................... 6-11
Cleaning the air filter element ...... 6-13
Adjusting the carburetor ............... 6-14
Adjusting the engine idling
speed ........................................ 6-15
Adjusting the throttle cable
free play .................................... 6-15
Valve clearance ............................ 6-16
Tires ............................................. 6-16
Spoke wheels ............................... 6-18Checking the brake lever
free play .................................... 6-19
Adjusting the brake pedal
free play .................................... 6-19
Adjusting the rear brake light
switch ....................................... 6-20
Checking the front brake pads and
rear brake shoes ...................... 6-20
Checking the front brake
fluid level .................................. 6-21
Changing the brake fluid .............. 6-22
Drive chain slack .......................... 6-22
Cleaning and lubricating the
drive chain ................................ 6-23
Checking and lubricating the
cables ....................................... 6-24
Checking and lubricating the
throttle grip and cable ............... 6-24
Lubricating the brake lever .......... 6-25
Lubricating the brake pedal ......... 6-25
Checking and lubricating the
centerstand and sidestand ....... 6-25
Lubricating the
swingarm pivots ........................ 6-26
Checking the front fork ................. 6-26
Checking the steering .................. 6-27
Checking the wheel bearings ....... 6-27
Battery ......................................... 6-28
Replacing the fuse ....................... 6-29
Replacing a headlight bulb .......... 6-30U5YPE0E0.book Page 1 Wednesday, February 23, 2005 4:22 PM

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

PRE-OPERATION CHECKS
4-2
4
EAU15603
Pre-operation check list
ITEM CHECKS PAGE
FuelCheck fuel level in fuel tank.
Refuel if necessary.
Check fuel line for leakage.3-6
Engine oilCheck oil level in engine.
If necessary, add recommended oil to specified level.
Check vehicle for oil leakage.6-9
CoolantCheck coolant level in reservoir.
If necessary, add recommended coolant to specified level.
Check cooling system for leakage.6-11
Front brakeCheck operation.
If soft or spongy, have Yamaha dealer bleed hydraulic system.
Check brake pads for wear.
Replace if necessary.
Check fluid level in reservoir.
If necessary, add recommended brake fluid to specified level.
Check hydraulic system for leakage.6-20, 6-21
Rear brakeCheck operation.
Check pedal free play.
Adjust if necessary.6-20
Throttle gripMake sure that operation is smooth.
Check cable free play.
If necessary, have Yamaha dealer adjust cable free play and lubricate cable and
grip housing.6-15, 6-24
Control cablesMake sure that operation is smooth.
Lubricate if necessary.6-24
Drive chainCheck chain slack.
Adjust if necessary.
Check chain condition.
Lubricate if necessary.6-22, 6-23
U5YPE0E0.book Page 2 Wednesday, February 23, 2005 4:22 PM

OPERATION AND IMPORTANT RIDING POINTS
5-1
5
EAU15950
WARNING
EWA10270


Become thoroughly familiar
with all operating controls and
their functions before riding.
Consult a Yamaha dealer re-
garding any control or function
that you do not thoroughly un-
derstand.


Never start the engine or oper-
ate it in a closed area for any
length of time. Exhaust fumes
are poisonous, and inhaling
them can cause loss of con-
sciousness and death within a
short time. Always make sure
that there is adequate ventila-
tion.


Before starting out, make sure
that the sidestand is up. If the
sidestand is not raised com-
pletely, it could contact the
ground and distract the opera-
tor, resulting in a possible lossof control.
EAU37640
Starting and warming up a
cold engine 1. Turn the key to “ON”.
2. Shift the transmission into the neu-
tral position.NOTE:
When the transmission is in the neutral
position, the neutral indicator light
should be on, otherwise have a
Yamaha dealer check the electrical cir-cuit.
3. Place the vehicle on the center-
stand.
WARNING
EWA14200
Before starting the engine, make
sure the transmission is in neutral
and that the vehicle is placed on thecenterstand.
4. Turn the starter (choke) on and
completely close the throttle. (See
page 3-7.)
5. Start the engine by pushing the
start switch or by pushing the kick-
starter lever down.
NOTE:If the engine fails to start by pushing the
start switch, release the switch, wait a
few seconds, and then try again. Each
starting attempt should be as short as
possible to preserve the battery. Do not
crank the engine more than 10 seconds
on any one attempt. If the engine does
not start with the starter motor, try usingthe kickstarter.CAUTION:
ECA15170
The coolant temperature warning
light should come on when the key
is turned to “ON”, and then go off af-
ter a few seconds. If the coolant tem-
perature warning light comes on
after starting, immediately stop the
engine, and have a Yamaha dealercheck the electrical circuit.
6. After starting the engine, move the
starter (choke) back halfway.
U5YPE0E0.book Page 1 Wednesday, February 23, 2005 4:22 PM

OPERATION AND IMPORTANT RIDING POINTS
5-4
5Avoid prolonged operation above 1/3
throttle.
After every hour of operation, stop the
engine, and then let it cool for five to ten
minutes.
Vary the engine speed from time to
time. Do not operate the engine at one
set throttle position.
150–500 km (90–300 mi)
Avoid prolonged operation above 1/2
throttle.
Rev the engine freely through the
gears, but do not use full throttle at any
time.500–1000 km (300–600 mi)
Avoid prolonged operation above 3/4
throttle.
1000 km (600 mi) and beyond
Avoid prolonged full-throttle operation.
Vary the engine speed occasionally.
CAUTION:
ECA10361


After 1000 km (600 mi) of opera-
tion, the engine oil must be
changed, the oil filter cartridge
or element replaced, and the oil
strainer cleaned.


If any engine trouble should oc-
cur during the engine break-in
period, immediately have a
Yamaha dealer check the vehi-cle.
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-3
6
9*WheelsCheck runout, spoke tightness and for damage.
Tighten spokes if necessary.√√√√
10*TiresCheck tread depth and for damage.
Replace if necessary.
Check air pressure.
Correct if necessary.√√√√ √
11*Wheel bearingsCheck bearing for looseness or damage.√√√√
12*SwingarmCheck operation and for excessive play.√√√√
Lubricate with lithium-soap-based grease. Every 24000 km
13 Drive chainCheck chain slack, alignment and condition.
Adjust and thoroughly lubricate chain with engine oil.Every 500 km and after washing the motorcycle or
riding in the rain
14*Steering bearingsCheck bearing play and steering for roughness.√√√√√
Lubricate with lithium-soap-based grease. Every 24000 km
15*Chassis fastenersMake sure that all nuts, bolts and screws are properly
tightened.√√√√ √
16 Sidestand, centerstandCheck operation.
Lubricate.√√√√ √
17*Front forkCheck operation and for oil leakage.√√√√
18*Shock absorber assem-
blyCheck operation and shock absorber for oil leakage.√√√√
19*CarburetorCheck starter (choke) operation.
Adjust engine idling speed.√√√√√ √
20 Engine oilChange.
Check oil level and vehicle for oil leakage.√√√√√ √
21 Engine oil filter elementReplace.√√√ NO. ITEM CHECK OR MAINTENANCE JOBODOMETER READING (× 1000 km)
ANNUAL
CHECK
1 6 12 18 24
U5YPE0E0.book Page 3 Wednesday, February 23, 2005 4:22 PM

PERIODIC MAINTENANCE AND MINOR REPAIR
6-7
6To install the panel
Place the panel in the original position,
and then install the screw and bolts.
EAU37560
Checking the spark plug The spark plug is an important engine
component, which is easy to check.
Since heat and deposits will cause any
spark plug to slowly erode, the spark
plug should be removed and checked
in accordance with the periodic mainte-
nance and lubrication chart. In addition,
the condition of the spark plug can re-
veal the condition of the engine.
To remove the spark plug
1. Remove cowling B. (See page
6-5.)
2. Remove the resonator bolt.
3. Move the resonator away as
shown.4. Remove the spark plug cap.
5. Remove the spark plug as shown,
with the spark plug wrench includ-
ed in the owner’s tool kit.1. Resonator bolt
1. Resonator
2. Spark plug cap
1. Spark plug wrench
U5YPE0E0.book Page 7 Wednesday, February 23, 2005 4:22 PM

PERIODIC MAINTENANCE AND MINOR REPAIR
6-8
6
To check the spark plug
1. Check that the porcelain insulator around the center electrode of the
spark plug is a medium-to-light tan
(the ideal color when the vehicle is
ridden normally).
NOTE:If the spark plug shows a distinctly dif-
ferent color, the engine could be defec-
tive. Do not attempt to diagnose such
problems yourself. Instead, have aYamaha dealer check the vehicle.
2. Check the spark plug for electrode erosion and excessive carbon or
other deposits, and replace it if
necessary.
To install the spark plug 1. Measure the spark plug gap with a wire thickness gauge and, if nec-
essary, adjust the gap to specifica-
tion. 2. Clean the surface of the spark plug
gasket and its mating surface, and
then wipe off any grime from the
spark plug threads.
3. Install the spark plug with the spark plug wrench, and then tight-
en it 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 –1/2 turn
past finger tight. However, the spark
plug should be tightened to the speci-fied torque as soon as possible.
4. Install the spark plug cap.
5. Place the resonator in the original position, and then tighten the bolt
to the specified torque.
6. Install the cowling.
Specified spark plug: NGK/CPR8EA-9/DENSO U24EPR-9
1. Spark plug gap
Spark plug gap: 0.8 –0.9 mm (0.031 –0.035 in)
Tightening torque: Spark plug:12.5 Nm (1.25 m ·kgf, 9.0 ft ·lbf)
Tightening torque:
Resonator bolt: 10 Nm (1.0 m ·kgf, 7.2 ft ·lbf)
U5YPE0E0.book Page 8 Wednesday, February 23, 2005 4:22 PM

PERIODIC MAINTENANCE AND MINOR REPAIR
6-9
6
EAU37570
Engine oil and oil filter
element The engine oil level should be checked
before each ride. In addition, the oil
must be changed and the oil filter ele-
ment replaced at the intervals specified
in the periodic maintenance and lubri-
cation chart.
To check the engine oil level
1. Place the vehicle on the center-
stand.NOTE:
Make sure that the vehicle is positioned
straight up when checking the oil level.
A slight tilt to the side can result in afalse reading.
2. Start the engine, warm it up for
several minutes, and then turn it
off.
3. Wait a few minutes until the oil set-
tles, remove the oil filler cap, wipe
the dipstick clean, insert it back
into the oil filler hole (without
screwing it in), and then remove it
again to check the oil level.
NOTE:
The engine oil should be between theminimum and maximum level marks.4. If the engine oil is at or below the
minimum level mark, add sufficient
oil of the recommended type to
raise it to the correct level.
5. Insert the dipstick into the oil filler
hole, and then tighten the oil filler
cap.
To change the engine oil (with or
without oil filter element replace-
ment)
1. Start the engine, warm it up for
several minutes, and then turn it
off.
2. Place an oil pan under the engine
to collect the used oil.
3. Remove the engine oil filler cap
and drain bolt along with the O-
ring, compression spring, and en-
gine oil strainer, to drain the oil
from the crankcase.1. Engine oil filler cap
1. Dipstick
2. Maximum level mark
3. Minimum level mark
U5YPE0E0.book Page 9 Wednesday, February 23, 2005 4:22 PM

PERIODIC MAINTENANCE AND MINOR REPAIR
6-10
6
CAUTION:
ECA11000
When removing the engine oil drain
bolt, the O-ring, compression
spring, and oil strainer will fall out.Take care not to lose these parts.NOTE:Check the O-ring for damage and re-place it if necessary.
4. Clean the engine oil strainer with
solvent.
NOTE:Skip steps 5–7 if the oil filter element isnot being replaced.
5. Remove the oil filter element cover
by removing the bolts.
6. Remove and replace the oil filter
element and O-ring.7. Install the oil filter element cover by
installing the bolts, then tightening
them to the specified torque.
NOTE:Make sure that the O-ring is properlyseated.
8. Install the engine oil strainer, com-
pression spring, O-ring and engine
oil drain bolt, and then tighten the
drain bolt to the specified torque.
1. Engine oil drain bolt
2. O-ring
3. Compression spring
4. Strainer
5. Oil pan
1. Bolt
2. Oil filter element cover
1. Oil filter element
2. O-ring
Tightening torque:
Oil filter element cover bolt:
10 Nm (1.0 m·kgf, 7.2 ft·lbf)
U5YPE0E0.book Page 10 Wednesday, February 23, 2005 4:22 PM