2021 YAMAHA MT-09 fuel

Periodic maintenance an d a djustment
7-15
7
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 prevent this from occurring, have
your Yamaha dealer check and adjust
the valve clearance at regular intervals.TIPThis service must be performed when
the 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 a djuste d on col d
tires (i.e., when the temperature
of the tires equals the amb ient
temperature).
 The tire air pressure must be
a d juste d in accor dance with the
ri din g speed and with the total wei
ght of ri der, passen ger, car-
g o, an d accessories approve d
for this mo del.
WARNING
EWA10512
Never overloa d your vehicle. Opera-
tion of an overload ed vehicle coul d
cause an acci dent.Col d tire air pressure:
1 person: Front:250 kPa (2.50 kgf/cm², 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:
166 kg (366 lb)
The vehicle’s maximum load is the
combined weight of the rider, pas-
senger, cargo, and any accessories.
UB7NE0E0.book Page 15 Friday, October 2, 2020 4:38 PM

Periodic maintenance an d a djustment
7-30
7
EAU91572
Replacin g the fusesThe fuse box is located under the seat.
(See page 4-24.)
If a fuse is blown, replace it as follows.
TIPThere is a spare fuse on the back
side of the fuse box cover. 
Use a fuse puller to remove the
fuse.
1. Turn the main switch off and turn
off the electrical circuit in ques-
tion.
2. Remove the fuse box cover by pressing inwards at the two points
indicated on the cover and pulling
upwards.
3. Remove the blown fuse using the fuse puller.
1. Fuse box
1 1 1
1. Ignition fuse 2
2. Signaling system fuse
3. Ignition fuse
4. Headlight fuse
5. ABS ECU fuse
6. Fuel injection system fuse
7. Electronic throttle valve fuse
8. Backup fuse 2
9. Main fuse
10.ABS motor fuse
11.ABS solenoid fuse
12.Radiator fan motor fuse
13.Terminal fuse 1
14.Backup fuse
15.Fuse puller
16.Spare fuse
1 12
3
4
5
6
7
8
1
2
3
4
5
6
7
8
9
10 10
11 11
12 12
13 13
14 14
16 16
16 16 9
10
11
12
13
14
16
1615 15 15
UB7NE0E0.book Page 30 Friday, October 2, 2020 4:38 PM

Periodic maintenance an d a djustment
7-31
7 4. Install a new fuse of the specified
amperage. WARNING! Do not
use a fuse of a hi gher ampera ge
ratin g than recommen ded to
avoi d causin g extensive d am-
a g e to the electrical system an d
possi bly a fire.
[EWA15132]
5. Insert the fuse puller, and then in-
stall the fuse box cover. 6. Turn the main switch on and turn
on the electrical circuit in question
to check if the device operates.
7. If the fuse immediately blows again, have a Yamaha dealer
check the electrical system.
NOTICE
ECA27210
Do not drive while the fuse box cov-
er is removed .
1. Fuse puller
1 1 1
Specified fuses:
Main fuse:
50.0 A
Te r m i n a l f u s e 1 :
2.0 A
Headlight fuse: 7.5 A
Signaling system fuse: 7.5 A
Ignition fuse:
10.0 A
Ignition fuse 2: 7.5 A
Radiator fan motor fuse: 15.0 A
ABS motor fuse:
30.0 A
ABS ECU fuse: 7.5 A
Fuel injection system fuse: 7.5 A
ABS solenoid fuse:
15.0 A
Backup fuse: 7.5 A
Backup fuse 2: 15.0 A
Electronic throttle valve fuse:
7.5 A
UB7NE0E0.book Page 31 Friday, October 2, 2020 4:38 PM

Periodic maintenance an d a djustment
7-33
7
EAU25872
Trou bleshootin gAlthough Yamaha motorcycles receive
a thorough inspection before shipment
from the factory, trouble may occur
during operation. Any problem in the
fuel, compression, or ignition systems,
for example, can cause poor starting
and loss of power.
The following troubleshooting charts
represent quick and easy procedures
for checking these vital systems your-
self. However, should your motorcycle
require any repair, take it to a Yamaha
dealer, whose skilled technicians have
the necessary tools, experience, and
know-how to service the motorcycle
properly.
Use only genuine Yamaha replace-
ment parts. Imitation parts may look
like Yamaha parts, but they are often
inferior, have a shorter service life and
can lead to expensive repair bills.
WARNING
EWA15142
When checkin g the fuel system, do
not smoke, an d make sure there are
no open flames or sparks in the ar-
ea, inclu din g pilot lig hts from water heaters or furnaces. Gasoline or
g
asoline vapors can i gnite or ex-
plod e, causin g severe injury or prop-
erty dama ge.UB7NE0E0.book Page 33 Friday, October 2, 2020 4:38 PM

Periodic maintenance an d a djustment
7-34
7
EAU86350
Trou bleshootin g chart
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.
Try starting the engine.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.
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(s). 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 battery is good.
DryWet
Try starting the engine.
Check the battery lead connections,
and charge the battery if necessary.
The engine does not start.
Check the ignition.
UB7NE0E0.book Page 34 Friday, October 2, 2020 4:38 PM

Motorcycle care and stora ge
8-3
8
will
become slippery, which
coul d cause loss of control.
Thorou ghly clean the surfaces
of these parts before operatin g
the vehicle.
[EWA20650]
5. Treat rubber, vinyl, and unpainted plastic parts with a suitable care
product.
6. Touch up minor paint damage caused by stones, etc.
7. Wax all painted surfaces using a non-abrasive wax or use a detail
spray for motorcycles.
8. When finished cleaning, start the engine and let it idle for several mi-
nutes to help dry any remaining
moisture.
9. If the headlight lens has fogged up, start the engine and turn on
the headlight to help remove the
moisture.
10. Let the vehicle dry completely be- fore storing or covering it.NOTICE
ECA26320
Do not apply wax to ru bber or
unpainte d plastic parts. 
Do not use a brasive polishin g
compoun ds as they will wear
away the paint.
 Apply sprays an d wax sparin gly.
Wipe off excess afterwar ds.
WARNING
EWA20660
Contaminants left on the brakes or
tires can cause loss of control.  Make sure there is no lu bricant
or wax on the brakes or tires.
 If necessary, wash the tires with
warm water an d a mil d d eter-
g ent.
 If necessary, clean the b rake
d iscs an d pad s with b rake
cleaner or acetone.
 Before ri din g at hi gher spee ds,
test the vehicle’s brakin g per-
formance an d cornerin g b ehav-
ior.
EAU83472
Stora geAlways store the vehicle in a cool, dry
place. If necessary, protect it against
dust with a porous cover. Be sure the
engine and the exhaust system are
cool before covering the vehicle. If the
vehicle often sits for weeks at a time
between uses, the use of a quality fuel
stabilizer is recommended after each
fill-up.NOTICE
ECA21170
 Storin g the vehicle in a poorly
ventilate d room or coverin g it
with a tarp, while it is still wet,
will allow water an d humi dity to
seep in an d cause rust.
 To prevent corrosion, avoi d
d amp cellars, stab les (because
of the presence of ammonia)
an d areas where stron g chemi-
cals are stored .Long term stora ge
Before storing the vehicle long term (60
days or more):
UB7NE0E0.book Page 3 Friday, October 2, 2020 4:38 PM

Motorcycle care and stora ge
8-4
8 1. Make all necessary repairs and
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 build-
ing up, drain the fuel in the carbu-
retor float chamber into a clean
container. Retighten the drain bolt
and pour the fuel back into the fuel
tank.
6. Use a quality engine fogging oil according to product instructions
to protect internal engine compo-
nents from corrosion. If engine
fogging oil is not available, per-
form the following steps for each
cylinder: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 d am-
a g e or injury from sparkin g,
make sure to groun d the
spark plu g electro des while
turnin g the en gine over.
[EWA10952]
e. Remove the spark plug cap
from the spark plug, and then
install the spark plug and the
spark plug cap.
7. Lubricate all control cables, piv- ots, levers and pedals, as well as
the sidestand and centerstand (if
equipped).
8. Check and correct the tire air pressure, and then lift the vehicle
so that all wheels are off the
ground. Otherwise, turn the wheels a little once a month in or-
der to prevent the tires from be-
coming 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 char- ge it, or attach a maintenance
charger to keep the battery opti-
mally charged. NOTICE: Confirm
that the battery an d its char ger
are compati ble. Do not char ge a
VRLA battery with a convention-
al char ger.
[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 7-28 for more informa-
tion on charging and storing the
battery.
UB7NE0E0.book Page 4 Friday, October 2, 2020 4:38 PM

Specifications
9-1
9
Dimensions:Overall length:2090 mm (82.3 in)
Overall width:
795 mm (31.3 in)
Overall height: 1190 mm (46.9 in)
Seat height: 825 mm (32.5 in)
Wheelbase:
1430 mm (56.3 in)
Ground clearance: 140 mm (5.51 in)
Minimum turning radius: 3.4 m (11.16 ft)Wei ght:Curb weight:
189 kg (417 lb)Engine:Combustion cycle:
4-stroke
Cooling system: Liquid cooled
Valve train: DOHC
Cylinder arrangement:
Inline
Number of cylinders: 3-cylinder
Displacement: 890 cm³
Bore × stroke:
78.0 × 62.1 mm (3.07 × 2.44 in) Starting system:
Electric starter
Engine oil:Recommended brand:
SAE viscosity grades:
10W-40
Recommended engine oil grade:
API service SG type or higher, JASO
standard MA
Engine oil quantity:
Oil change:2.80 L (2.96 US qt, 2.46 Imp.qt)
With oil filter removal:
3.20 L (3.38 US qt, 2.82 Imp.qt)Coolant quantity:Coolant reservoir (up to the maximum level
mark):0.28 L (0.30 US qt, 0.25 Imp.qt)
Radiator (including all routes): 1.72 L (1.82 US qt, 1.51 Imp.qt)Fuel:Recommended fuel:Unleaded gasoline (E10 acceptable)
Octane number (RON): 95
Fuel tank capacity:
14 L (3.7 US gal, 3.1 Imp.gal)
Fuel reserve amount: 2.8 L (0.74 US gal, 0.62 Imp.gal)
Fuel injection:Throttle body:ID mark:B7N1Drivetrain:Gear ratio:
1st: 2.571 (36/14)
2nd:
1.947 (37/19)
3rd: 1.619 (34/21)
4th: 1.381 (29/21)
5th:
1.190 (25/21)
6th: 1.037 (28/27)Front tire:Type:
Tubeless
Size: 120/70ZR17M/C (58W)
Manufacturer/model: BRIDGESTONE/BATTLAX HYPERSPORT S22FRear tire:Type:
Tubeless
Size: 180/55ZR17M/C (73W)
Manufacturer/model: BRIDGESTONE/BATTLAX HYPERSPORT S22R
UB7NE0E0.book Page 1 Friday, October 2, 2020 4:38 PM