2019 YAMAHA MT-09 check engine

Periodic maintenance and adjustment7-17
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EAU21403
Valve clearanceThe valves are an important engine
component, and since valve clearance
changes with use, they must be
checked and adjusted at the intervals
specified in the periodic maintenance
chart. Unadjusted valves can result in
improper air-fuel mixture, engine noise,
and eventually engine damage. To pre-
vent this from occurring, have your
Yamaha dealer check and adjust the
valve clearance at regular intervals.TIPThis service must be performed whenthe engine is cold.
EAU64412
TiresTires are the only contact between the
vehicle and the road. Safety in all con-
ditions of riding depends on a relatively
small area of road contact. Therefore, it
is essential to maintain the tires in good
condition at all times and replace them
at the appropriate time with the speci-
fied tires.
Tire air pressure
The tire air pressure should be checked
and, if necessary, adjusted before each
ride.
WARNING
EWA10504
Operation of this vehicle with im-
proper tire pressure may cause se-
vere injury or death from loss of
control.
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 approved
for this model.WARNING
EWA10512
Never overload your vehicle. Opera-
tion of an overloaded vehicle couldcause an accident.
Cold tire air pressure:
1 person:
Front: 250 kPa (2.50 kgf/cm
2, 36 psi)
Rear:
290 kPa (2.90 kgf/cm2, 42 psi)
2 persons: Front:
250 kPa (2.50 kgf/cm2, 36 psi)
Rear: 290 kPa (2.90 kgf/cm2, 42 psi)
Maximum load: Vehicle:174 kg (384 lb)
The vehicle’s maximum load is the
combined weight of the rider, passen-
ger, cargo, and any accessories.
BS2-9-E2.book 17 ページ ２０１８年８月１０日　金曜日　午前９時３６分

Periodic maintenance and adjustment
7-24
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EAU22762
Drive chain slackThe drive chain slack should be
checked before each ride and adjusted
if necessary.
EAU2277G
To check the drive chain slack 1. Place the motorcycle on the sides- tand.TIPWhen checking and adjusting the drive
chain slack, there should be no weighton the motorcycle.
2. Shift the transmission into the neu- tral position.
3. Measure the drive chain slack as shown. 4. If the drive chain slack is incorrect,
adjust it as follows. NOTICE: Im-
proper drive chain slack will
overload the engine as well as
other vital parts of the motorcy-
cle and can lead to chain slip-
page or breakage. If the drive
chain slack is more than 25.0
mm (0.98 in), the chain can dam-
age the frame, swingarm, and
other parts. To prevent this from
occurring, keep the drive chain
slack within the specified lim-
its.
[ECA17791] EAU57971
To adjust the drive chain slack
Consult a Yamaha dealer before ad-
justing the drive chain slack.
1. Loosen the axle nut and the lock- nut on each side of the swingarm.
2. To tighten the drive chain, turn the drive chain slack adjusting bolt on
each side of the swingarm in direc-
tion (a). To loosen the drive chain,
turn the adjusting bolt on each side
of the swingarm in direction (b),
and then push the rear wheel for-
ward.
1. Drive chain slackDrive chain slack:5.0–15.0 mm (0.20–0.59 in)
1
1. Axle nut
2. Locknut
1
2
BS2-9-E2.book 24 ページ ２０１８年８月１０日　金曜日　午前９時３６分

Periodic maintenance and adjustment7-37
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EAU42365
Troubleshooting chartsStarting problems or poor engine performance
Check the fuel level in
the fuel tank.1. Fuel
There is enough fuel.
There is no fuel.
Check the battery.
Supply fuel.
The engine does not start.
Check the battery.
Remove the spark plugs
and check the electrodes.3. Ignition
Wipe off with a dry cloth and correct the
spark plug gaps, or replace the spark plugs.
Have a Yamaha dealer check the vehicle.
Operate the electric starter.4. Compression
There is compression.
There is no compression.
The engine does not start.
Have a Yamaha dealer check the vehicle.Have a Yamaha dealer check the vehicle.
The engine does not start.
Check the compression.
Operate the electric starter.2. Battery
The engine turns over
quickly.
The engine turns over
slowly.
The engine does not start.
Check the ignition.
The battery is good.Check the battery lead connections,
and have a Yamaha dealer charge
the battery if necessary.
DryWet
Operate the electric starter.
BS2-9-E2.book 37 ページ ２０１８年８月１０日　金曜日　午前９時３６分

Periodic maintenance and adjustment
7-38
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12 Engine overheating
WARNING
EWA10401

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.
TIPIf coolant is not available, tap water can be temporarily us
ed 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 TIP.)
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.
BS2-9-E2.book 38 ページ ２０１８年８月１０日　金曜日　午前９時３６分

Motorcycle care and storage
8-4
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12 perform any outstanding mainte-
nance.
2. Follow all instructions in the Care section of this chapter.
3. Fill up the fuel tank, adding fuel stabilizer according to product in-
structions. Run the engine for 5
minutes to distribute treated fuel
through the fuel system.
4. For vehicles equipped with a fuel cock: Turn the fuel cock lever to
the off position.
5. For vehicles with a carburetor: To prevent fuel deposits from building
up, drain the fuel in the carburetor
float chamber into a clean contain-
er. Retighten the drain bolt and
pour the fuel back into the fuel
tank.
6. Use a quality engine fogging oil ac- cording to product instructions to
protect internal engine compo-
nents from corrosion. If engine fog-
ging oil is not available, perform
the following steps for each cylin-
der:
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 the
spark plug electrodes while
turning the engine
over.
[EWA10952]
e. Remove the spark plug capfrom the spark plug, and then
install the spark plug and the
spark plug cap.
7. Lubricate all control cables, pivots, levers and pedals, as well as the
sidestand and centerstand (if
equipped).
8. Check and correct the tire air pres- sure, and then lift the vehicle so
that all wheels are off the ground.
Otherwise, turn the wheels a little
once a month in order to prevent the tires from becoming degraded
in one spot.
9. Cover the muffler outlet with a plastic bag to prevent moisture
from entering it.
10. Remove the battery and fully charge it, or attach a maintenance
charger to keep the battery opti-
mally charged. NOTICE: Confirm
that the battery and its charger
are compatible. Do not charge a
VRLA battery with a convention-
al charger.
[ECA26330]
TIP
If the battery will be removed,
charge it once a month and store it
in a temperate location between
0-30 C (32-90 F).

See page 7-30 for more informa-
tion on charging and storing thebattery.
BS2-9-E2.book 4 ページ ２０１８年８月１０日　金曜日　午前９時３６分

Consumer information
10-2
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EAU26481
Model label
The model label is affixed to the frame
under the seat. (See page 4-20.) Re-
cord the information on this label in the
space provided. This information will be
needed when ordering spare parts from
a Yamaha dealer.
EAU69910
Diagnostic connectorThe diagnostic connector is located as
shown.
EAU85300
Vehicle data recordingThis model’s ECU stores certain vehi-
cle data to assist in the diagnosis of
malfunctions and for research, statisti-
cal analysis and development purpos-
es.
Although the sensors and recorded
data will vary by model, the main data
points are:
Vehicle status and engine perfor-
mance data

Fuel-injection and emission-relat-
ed data
This data will be uploaded only when a
special Yamaha diagnostic tool is at-
tached to the vehicle, such as when
maintenance checks or service proce-
dures are performed.
Vehicle data uploaded will be handled
appropriately according to the following
Privacy Policy.
Privacy Policy
Yamaha will not disclose this data to a
third party except in the following cas-
1. Model label
1
1. Diagnostic connector
1
https://www.yamaha-motor.eu/eu/
privacy/privacy-policy.aspx
BS2-9-E2.book 2 ページ ２０１８年８月１０日　金曜日　午前９時３６分

11-1
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IndexAABS ....................................................... 4-15
ABS warning light.................................... 4-6
Air filter element .................................... 7-16
Auxiliary DC connectors........................ 4-25BBattery................................................... 7-30
Brake and clutch levers, checking and lubricating ........................................... 7-27
Brake and shift pedals, checking and
lubricating ........................................... 7-27
Brake fluid, changing ............................ 7-23
Brake fluid level, checking .................... 7-22
Brake lever ............................................ 4-14
Brake lever free play, checking ............. 7-20
Brake light switches .............................. 7-21
Brake pedal ........................................... 4-15CCables, checking and lubricating .......... 7-26
Canister................................................. 7-11
Care ........................................................ 8-1
Catalytic converter ................................ 4-19
Clutch lever ........................................... 4-14
Clutch lever free play, adjusting ............ 7-20
Coolant.................................................. 7-14
Coolant temperature warning light .......... 4-5DData recording, vehicle ......................... 10-2
Diagnostic connector ............................ 10-2
Dimmer switch ........................................ 4-4
D-mode (drive mode) .............................. 3-1
Drive chain, cleaning and lubricating .... 7-25
Drive chain slack ................................... 7-24
Drive mode switch................................... 4-4
EEngine break-in ...................................... 6-3
Engine idling speed, checking .............. 7-16
Engine oil .............................................. 7-11
Engine serial number............................ 10-1
Engine trouble warning light ................... 4-6FFront and rear brake pads, checking .... 7-21
Front fork, adjusting .............................. 4-21
Front fork, checking .............................. 7-29
Fuel....................................................... 4-17
Fuel consumption, tips for reducing........ 6-3
Fuel tank cap ........................................ 4-16
Fuel tank overflow hose........................ 4-19
Fuses, replacing ................................... 7-31HHandlebar switches ................................ 4-3
Hazard switch ......................................... 4-4
High beam indicator light ........................ 4-5
Horn switch ............................................. 4-4IIdentification numbers .......................... 10-1
Ignition circuit cut-off system ................ 4-26
Immobilizer system ................................. 4-1
Immobilizer system indicator light........... 4-6
Indicator lights and warning lights .......... 4-5LLuggage strap holders .......................... 4-24MMain switch/steering lock........................ 4-2
Maintenance and lubrication, periodic .... 7-5
Maintenance, emission control system... 7-3
Matte color, caution ................................ 8-1
Model label ........................................... 10-2 Multi-function meter unit .......................... 4-7
NNeutral indicator light .............................. 4-5OOil level warning light .............................. 4-5PPanel, removing and installing ................ 7-9
Parking .................................................... 6-4
Part locations .......................................... 2-1
Pass switch ............................................. 4-4QQuick shift indicator light ......................... 4-6
Quick shift system ................................... 3-3SSafety information ................................... 1-1
Seat ....................................................... 4-20
Shifting .................................................... 6-2
Shift pedal ............................................. 4-14
Shock absorber assembly, adjusting .... 4-23
Sidestand .............................................. 4-25
Sidestand, checking an
d lubricating...... 7-28
Spark plugs, checking ........................... 7-10
Special features ...................................... 3-1
Specifications .......................................... 9-1
Starting the engine .................................. 6-1
Steering, checking................................. 7-29
Stop/Run/Start switch.............................. 4-4
Storage.................................................... 8-3
Storage compartment............................ 4-20
Supporting the motorcycle .................... 7-35
Swingarm pivots, lubricating ................. 7-28TThrottle grip and cable, checking and
lubricating ........................................... 7-26
BS2-9-E2.book 1 ページ ２０１８年８月１０日　金曜日　午前９時３６分