check engine YAMAHA T105 2009 User Guide

PERIODIC MAINTENANCE AND ADJUSTMENT
6-10
6addition, do not use oils labeled
“ENERGY CONSERVING II” or
higher.


Make sure that no foreign mate-rial enters the crankcase.
6. Start the engine, and then let it idle
for several minutes while checking
it for oil leakage. If oil is leaking, im-
mediately turn the engine off and
check for the cause.
7. Turn the engine off, and then
check the oil level and correct it if
necessary.
EAU47770
Cleaning the air filter element The air filter element should be cleaned
or replaced at the intervals specified in
the periodic maintenance and lubrica-
tion chart. Clean or, if necessary, re-
place the air filter element more
frequently if you are riding in unusually
wet or dusty areas.
1. Remove the air filter case cover by
removing the screws.
2. 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. Screw1
22
1. Air filter element
1. Air filter element
1
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PERIODIC MAINTENANCE AND ADJUSTMENT
6-11
6 4. Insert the air filter element into the
air filter case. NOTICE: Make sure
that the air filter element is prop-
erly 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) may
become excessively worn.
[ECA10481]
5. Install the air filter case cover by in-
stalling the screws.
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.NOTICE
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.
EAU21340
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.TIP

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


A diagnostic tachometer is neededto make this adjustment.
1. Attach the tachometer to the spark
plug lead.
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 en-
gine idling speed, turn the screw in
direction (b).
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PERIODIC MAINTENANCE AND ADJUSTMENT
6-12
6
TIPIf the specified idling speed cannot be
obtained as described above, have aYamaha dealer make the adjustment.
EAU21382
Checking 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, have a Yamaha dealer adjust it.
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.
1. Throttle stop screwEngine idling speed:
1400–1600 r/min
(b)(a)
1
1
1. Throttle cable free play
1
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PERIODIC MAINTENANCE AND ADJUSTMENT
6-21
6
EAU23101
Checking and lubricating the
cables The operation of all control cables and
the condition of the cables should be
checked before each ride, and the ca-
bles and cable ends should be lubricat-
ed if necessary. If a cable is damaged
or does not move smoothly, have a
Yamaha dealer check or replace it.
WARNING! Damage to the outer
sheath may interfere with proper ca-
ble operation and will cause the in-
ner cable to rust. Replace a
damaged cable as soon as possible
to prevent unsafe conditions.
[EWA10721]EAU23111
Checking and lubricating the
throttle grip and cable The operation of the throttle grip should
be checked before each ride. In addi-
tion, the cable should be lubricated at
the intervals specified in the periodic
maintenance chart.
EAU23153
Checking and lubricating the
brake lever The operation of the brake lever should
be checked before each ride, and the
lever pivots should be lubricated if nec-
essary.
Recommended lubricant:
Engine oil
Recommended lubricant:
Silicone grease
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PERIODIC MAINTENANCE AND ADJUSTMENT
6-36
6
EAU25902
Troubleshooting chart
Check the fuel level in
the fuel tank.1. Fuel
There is enough fuel.
There is no fuel.
Check the compression.
Supply fuel.
The engine does not start.
Check the compression.
Operate the electric starter.2. Compression
There is compression.
There is no compression.
Check the ignition.
Have a Yamaha dealer
check the vehicle.
Remove the spark plug
and check the electrodes.3. Ignition
Wipe off with a dry cloth and correct the
spark plug gap, or replace the spark plug.
Have a Yamaha dealer check the vehicle.
The engine does not start.
Have a Yamaha dealer
check the vehicle.
The engine does not start.
Check the battery.
Operate the electric starter.4. Battery
The engine turns over
quickly.
The engine turns over
slowly.
The battery is good.Check the battery lead connections,
and charge the battery if necessary.
DryWet
Open the throttle halfway and operate
the electric starter.
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MOTORCYCLE CARE AND STORAGE
7-4
73. Drain the carburetor float chamber
by loosening the drain bolt; this will
prevent fuel deposits from building
up. Pour the drained fuel into the
fuel tank.
4. Fill up the fuel tank and add fuel
stabilizer (if available) to prevent
the fuel tank from rusting and the
fuel from deteriorating.
5. Perform the following steps to pro-
tect the cylinder, piston rings, etc.
from corrosion.
a. Remove the spark plug cap
and spark plug.
b. Pour a teaspoonful of engine oil
into the spark plug bore.
c. Install the spark plug cap onto
the spark plug, and then place
the spark plug on the cylinder
head so that the electrodes are
grounded. (This will limit spark-
ing during the next step.)
d. Turn the engine over several
times with the starter. (This will
coat the cylinder wall with oil.)
WARNING! To prevent dam-
age or injury from sparking,
make sure to ground thespark plug electrodes while
turning the engine over.
[EWA10951]
e. Remove the spark plug cap
from the spark plug, and then
install the spark plug and the
spark plug cap.
6. Lubricate all control cables and the
pivoting points of all levers and
pedals as well as of the side-
stand/centerstand.
7. Check and, if necessary, correct
the tire air pressure, and then lift
the motorcycle so that both of its
wheels are off the ground. Alterna-
tively, turn the wheels a little every
month in order to prevent the tires
from becoming degraded in one
spot.
8. Cover the muffler outlet with a
plastic bag to prevent moisture
from entering it.
9. Remove the battery and fully
charge it. Store it in a cool, dry
place and charge it once a month.
Do not store the battery in an ex-
cessively cold or warm place [less
than 0 °C (30 °F) or more than 30°C (90 °F)]. For more information
on storing the battery, see page
6-24.
TIPMake any necessary repairs beforestoring the motorcycle.
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INDEXAAir filter element, cleaning..................... 6-10
Auxiliary light bulb, replacing ................ 6-30BBattery................................................... 6-24
Brake fluid, changing ............................ 6-18
Brake fluid level, checking .................... 6-17
Brake lever .............................................. 3-4
Brake lever, checking and lubricating ... 6-21
Brake pads and shoes, checking .......... 6-16
Brake pedal ............................................. 3-5
Brake pedal, checking and
lubricating ........................................... 6-22
Brake pedal free play, adjusting............ 6-15CCables, checking and lubricating .......... 6-21
Carburetor, adjusting ............................ 6-11
Care ........................................................ 7-1
Carrier ................................................... 3-10
Catalytic converter .................................. 3-7
Centerstand, checking and
lubricating ........................................... 6-22
Cowling and panel, removing and
installing................................................ 6-6DDimmer switch ........................................ 3-4
Drive chain, cleaning and lubricating .... 6-20
Drive chain slack ................................... 6-18EEngine break-in ....................................... 5-3
Engine idling speed............................... 6-11
Engine oil ................................................ 6-8
Engine serial number .............................. 9-2
Engine, starting a warm .......................... 5-2
FFront fork, checking .............................. 6-23
Fuel......................................................... 3-6
Fuel consumption, tips for reducing........ 5-3
Fuel gauge.............................................. 3-3
Fuel tank cap .......................................... 3-5
Fuse, replacing ..................................... 6-26GGear position indicator lights .................. 3-2HHandlebar switches ................................ 3-3
Headlight bulb, replacing ...................... 6-27
Helmet holders ....................................... 3-9
High beam indicator light ........................ 3-2
Horn switch ............................................. 3-4IIdentification numbers ............................ 9-1
Indicator lights ........................................ 3-2KKey identification number ....................... 9-1
Kickstarter............................................... 3-8LLicense plate light bulb, replacing ........ 6-30MMain switch/steering lock........................ 3-1
Maintenance and lubrication, periodic .... 6-3
Maintenance, emission control system... 6-2
Matte color, caution ................................ 7-1NNeutral indicator light .............................. 3-2PParking ................................................... 5-4
Part locations .......................................... 2-1
RRear brake light switch, adjusting ......... 6-16SSafety information ................................... 1-1
Seat ......................................................... 3-8
Shifting .................................................... 5-2
Shift pedal ............................................... 3-4
Shift pedal, checking ............................. 6-16
Spark plug, checking ............................... 6-7
Specifications .......................................... 8-1
Speedometer unit .................................... 3-3
Starter (choke) lever................................ 3-8
Starting and warming up a cold engine ... 5-1
Start switch.............................................. 3-4
Steering, checking................................. 6-23
Storage.................................................... 7-3
Storage compartment.............................. 3-9
Swingarm pivots, lubricating ................. 6-22TTail/brake light bulb, replacing .............. 6-28
Throttle cable free play, checking ......... 6-12
Throttle grip and cable, checking and
lubricating ........................................... 6-21
Tires ...................................................... 6-13
Tool kit..................................................... 6-1
Troubleshooting .................................... 6-35
Troubleshooting chart ........................... 6-36
Turn signal indicator light ........................ 3-2
Turn signal light bulb (front),
replacing ............................................. 6-28
Turn signal light bulb (rear), replacing... 6-29
Turn signal switch ................................... 3-4VValve clearance..................................... 6-12
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