2018 YAMAHA MT-09 spark plugs

Table of contentsSafety information........................... 1-1
Description ....................................... 2-1
Left view ......................................... 2-1
Right view ....................................... 2-2
Controls and instruments................ 2-3
Special features ............................... 3-1
D-mode (drive mode)...................... 3-1
Traction control system .................. 3-1
Quick shift system ...... .................... 3-3
Instrument and control
functions ........................................... 4-1
Immobilizer system ..... .................... 4-1
Main switch/steering lock................ 4-2
Handlebar switches ........................ 4-4
Indicator lights and warning lights ............................................ 4-5
Multi-function meter unit ................. 4-8
Clutch lever................................... 4-14
Shift pedal..... ............................ .... 4-14
Brake lever ................................... 4-15
Brake pedal .................................. 4-15
ABS .............................................. 4-16
Fuel tank cap ................................ 4-17
Fuel............................................... 4-17
Fuel tank overflow hose................ 4-19
Catalytic converter ........................ 4-19
Seat .............................................. 4-20
Storage compartment ................... 4-21 Adjusting the front fork ................. 4-21
Adjusting the shock absorber
assembly................................... 4-23
Luggage strap holders . ................ 4-25
Auxiliary DC connectors ............... 4-25
Sidestand ..................................... 4-25
Ignition circuit cut- off system ........ 4-26
For your safety – pre-operation
checks .............................................. 5-1
Operation and important riding
points ................................................ 6-1
Starting the engine ......................... 6-1
Shifting ........................................... 6-2
Tips for reducing fuel consumption ............................... 6-3
Engine break-in .............................. 6-3
Parking ........................................... 6-4
Periodic maintenance and
adjustment ....................................... 7-1
Owner’s tool kit............................... 7-2
Periodic maintenance chart for the emission control system ....... 7-3
General maintenance and lubrication chart .......................... 7-5
Removing and installing panels ..... 7-9
Checking the spark plugs ............. 7-10
Canister ........................................ 7-11
Engine oil ..................................... 7-12 Coolant ........................................ 7-14
Air filter element ........................... 7-16
Checking the engine idling
speed............ ............................ 7-16
Checking the throttle grip
free play.................................... 7-16
Valve clearance ........................... 7-17
Tires ............................................. 7-17
Cast wheels ................................. 7-19
Adjusting the clutch lever free play.................................... 7-20
Checking the brake lever free play.................................... 7-20
Brake light switches ..................... 7-21
Checking the front and rear brake pads................................ 7-21
Checking the brake fluid level ...... 7-22
Changing the brake fluid .............. 7-23
Drive chain slack.......................... 7-24
Cleaning and lubricating the
drive chain ................................ 7-25
Checking and lubricating the cables ....................................... 7-26
Checking and lubricating the throttle grip and cable ............... 7-26
Checking and lubricating the brake and shift pedals .............. 7-27
Checking and lubricating the
brake and clutch levers ............ 7-27
Checking and lubricating the sidestand .................................. 7-28BS2-9-E1E0_1.book 1 ページ ２０１８年４月２７日　金曜日　午後４時５０分

Periodic maintenance and adjustment
7-3
1
2
3
4
5
678
9
10
11
12
EAU71031
TIP
The annual checks must be performed every year, except if a distance-based maintenance is performed in-
stead.

From 50000 km (30000 mi), repeat the maintenance intervals starting from 10000 km (6000 mi).

Items marked with an asterisk should be performed by a Yamaha dealer as they require special tools, data and technicalskills.
EAU71051
Periodic maintenance chart for the emission control systemNO. ITEM CHECK OR MAINTENANCE JOB ODOMETER READING
ANNUAL
CHECK
1000 km
(600 mi) 10000 km
(6000 mi) 20000 km
(12000 mi) 30000 km
(18000 mi) 40000 km
(24000 mi)
1 *Fuel line Check fuel hoses for cracks or
damage.
Replace if necessary. 
2 *Spark plugs Check condition.
Adjust gap and clean.

Replace. 
3 *Valve clearance Check and adjust. Every 40000 km (24000 mi)
4 *Fuel injection Check engine idle speed.

Check and adjust synchronization. 
5 *Exhaust system Check for leakage.
Tighten if necessary.
Replace gaskets if necessary. 
6 *Evaporative
emission control
system Check control system for damage.
Replace if necessary.

BS2-9-E1E0_1.book 3 ページ ２０１８年４月２７日　金曜日　午後４時５０分

Periodic maintenance and adjustment
7-10
1
2
3
4
5
67
8
9
10
11
12 Panel B
To remove the panel
1. Remove the bolts and washers.
2. Pull the panel outward as shown.
To install the panel
Place the panel in the original position,
and then install the washers and bolts.
EAU19653
Checking the spark plugsThe spark plugs are important engine
components, which should be checked
periodically, preferably by a Yamaha
dealer. Since heat and deposits will
cause any spark plug to slowly erode,
they should be removed and checked
in accordance with the periodic mainte-
nance and lubrication chart. In addition,
the condition of the spark plugs can re-
veal the condition of the engine.
The porcelain insulator around the cen-
ter electrode of each spark plug should
be a medium-to-light tan (the ideal color
when the vehicle is ridden normally),
and all spark plugs installed in the en-
gine should have the same color. If any
spark plug shows a distinctly different
color, the engine could be operating im-
properly. Do not attempt to diagnose
such problems yourself. Instead, have
a Yamaha dealer check the vehicle.
If a spark plug shows signs of electrode
erosion and excessive carbon or other
deposits, it should be replaced.
1. Bolt
2. Washer
1
2
1
2
1. Panel B
1
Specified spark plug:
NGK/CPR9EA9
BS2-9-E1E0_1.book 10 ページ ２０１８年４月２７日　金曜日　午後４時５０分

Periodic maintenance and adjustment7-37
1
2
3
4
5
678
9
10
11
12
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-E1E0_1.book 37 ページ ２０１８年４月２７日　金曜日　午後４時５０分

Motorcycle care and storage
8-4
1
2
3
4
5
6
78
9
10
11
12 2. Fill up the fuel tank and add fuel
stabilizer (if available) to prevent
the fuel tank from rusting and the
fuel from deteriorating.
3. Perform the following steps to pro- tect the cylinders, piston rings, etc.
from corrosion.
a. Remove the spark plug caps and spark plugs.
b. Pour a teaspoonful of engine oil into each spark plug bore.
c. Install the spark plug caps onto the spark plugs, and then place
the spark plugs 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 walls 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 capsfrom the spark plugs, and then
install the spark plugs and the spark plug caps.
4. Lubricate all control cables and the pivoting points of all levers and
pedals as well as of the sidestand/
centerstand.
5. 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.
6. Cover the muffler outlet with a plastic bag to prevent moisture
from entering it.
7. 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
7-30.
TIPMake any necessary repairs beforestoring the motorcycle.
BS2-9-E1E0_1.book 4 ページ ２０１８年４月２７日　金曜日　午後４時５０分

11-1
1
2
3
4
5
6
7
8
9
1011
12
IndexAABS ....................................................... 4-16
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 ............................................ 4-15
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 .......... 4-6DData 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................................... 4-5
EEngine break-in ...................................... 6-3
Engine idling speed, checking .............. 7-16
Engine oil .............................................. 7-12
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 ........................................ 4-17
Fuel tank overflow hose........................ 4-19
Fuses, replacing ................................... 7-31HHandlebar switches ................................ 4-4
Hazard switch ......................................... 4-5
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........... 4-7
Indicator lights and warning lights .......... 4-5LLuggage strap holders .......................... 4-25MMain 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 .......................... 4-8
NNeutral indicator light .............................. 4-5OOil level warning light .............................. 4-5PPanels, removing and installing .............. 7-9
Parking .................................................... 6-4
Part locations .......................................... 2-1
Pass switch ............................................. 4-4QQuick shift indicator light ......................... 4-7
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............................ 4-21
Supporting the motorcycle .................... 7-35
Swingarm pivots, lubricating ................. 7-28
BS2-9-E1E0_1.book 1 ページ ２０１８年４月２７日　金曜日　午後４時５０分