YAMAHA MT-09 2021 Service Manual

Instrument and control functions
4-22
4
EAU13222
FuelMake sure there is sufficient gasoline in
the tank.
WARNING
EWA10882
Gasoline an d gasoline vapors are
extremely flammab le. To avoid fires
an d explosions an d to re duce the
risk of injury when refueling , follow
these instructions.1. Before refueling, turn off the en- gine and be sure that no one is sit-
ting on the vehicle. Never refuel
while smoking, or while in the vi-
cinity of sparks, open flames, or
other sources of ignition such as
the pilot lights of water heaters
and clothes dryers.
2. Do not overfill the fuel tank. When refueling, be sure to insert the
pump nozzle into the fuel tank filler
hole. Stop filling when the fuel
reaches the bottom of the filler
tube. Because fuel expands when
it heats up, heat from the engine or
the sun can cause fuel to spill out
of the fuel tank. 3. Wipe up any spilled fuel immedi-
ately. NOTICE: Immediately
wipe off spille d fuel with a clean,
d ry, soft cloth, since fuel may
d eteriorate painte d surfaces or
plastic parts.
[ECA10072]
4. Be sure to securely close the fuel tank cap.
WARNING
EWA15152
Gasoline is poisonous an d can cau-
se injury or death. Han dle gasoline
with care. Never siphon gasoline by
mouth. If you shoul d swallow some
g asoline or inhale a lot of gasoline
vapor, or get some g asoline in your
eyes, see your d octor immediately. If g
asoline spills on your skin, wash
with soap an d water. If g asoline
spills on your clothin g, chan ge your
clothes.
EAU86072
Your Yamaha engine was designed to
use unleaded gasoline with a research
octane number of 95 or higher. If en-
gine knocking or pinging occurs, use a
gasoline of a different brand or higher
octane rating.
1. Fuel tank filler tube
2. Maximum fuel level
1
2
Recommen ded fuel:
Unleaded gasoline (E10 acceptable)
Octane num ber (RON):
95
Fuel tank capacity: 14 L (3.7 US gal, 3.1 Imp.gal)
Fuel tank reserve:
2.8 L (0.74 US gal, 0.62 Imp.gal)
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Instrument and control functions
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4
TIP This mark identifies the recom-
mended fuel for this vehicle as
specified by European regulation
(EN228).
 Confirm the gasoline pump nozzle
has the same fuel identification
mark.Gasohol
There are two types of gasohol: gaso-
hol containing ethanol and that con-
taining methanol. Gasohol containing
ethanol can be used if the ethanol con-
tent does not exceed 10% (E10). Gas-
ohol containing methanol is not
recommended by Yamaha because it
can cause damage to the fuel system
or vehicle performance problems.
NOTICE
ECA11401
Use only unlea ded g asoline. The use
of lea ded g asoline will cause severe
d amag e to internal en gine parts,
such as the valves an d piston rin gs,
as well as to the exhaust system.
EAU86160
Fuel tank overflow hoseThe overflow hose drains excess gaso-
line and directs it safely away from the
vehicle.
Before operating the vehicle:  Check the fuel tank overflow hose
connection.
 Check the fuel tank overflow hose
for cracks or damage, and replace
it if necessary.
 Make sure that the fuel tank over-
flow hose is not blocked, and
clean it if necessary.
 Make sure that the fuel tank over-
flow hose is positioned as shown.
E5
E10
1. Fuel tank overflow hose
2. White mark
3. Clamp
111
32
22
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Instrument and control functions
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4
TIPSee page 7-10 for canister information.
EAU13435
Catalytic converterThe exhaust system contains catalytic
converter(s) to reduce harmful exhaust
emissions.
WARNING
EWA10863
The exhaust system is hot after op-
eration. To prevent a fire hazar d or
b urns:
 Do not park the vehicle near
possi ble fire hazar ds such as
g rass or other materials that
easily burn.
 Park the vehicle in a place
where pe destrians or child ren
are not likely to touch the hot
exhaust system.
 Make sure that the exhaust sys-
tem has cooled down before
d oin g any maintenance work.
 Do not allow the en gine to id le
more than a few minutes. Lon g
i d lin g can cause a buil d-up of
heat.
EAU57992
SeatTo remove the seat 1. Open the seat lock cover, insert the key into the seat lock, and then
turn the key counterclockwise.
2. While holding the key in that posi- tion, slide the seat backward and
then lift the rear of the seat up, and
then pull the seat off.
To install the seat 1. Insert the projections into the seat holders as shown.1. Seat lock cover
2. Seat lock
3. Unlock.
3 3
1 2 3
1
2
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Instrument and control functions
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4
2. Push the rear of the seat down tolock it in place.
3. Remove the key.
TIPMake sure that the seat is properly se-
cured before riding.
EAU91560
Ri der footrest positionThe rider footrests can be adjusted to
one of two positions. From the factory,
the footrests are in the low position.
Have a Yamaha dealer adjust the posi-
tions of the rider footrests.
EAU46833
Han dle bar position The handlebar can be adjusted to one
of two positions to suit the rider’s pref-
erence. Have a Yamaha dealer adjust
the position of the handlebar.
1. Projection
2. Seat holder2 2 2 1
1
1. Handlebar
1
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Instrument and control functions
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4
EAU76345
A djustin g the front fork
WARNING
EWA14671
Always a djust the sprin g preloa d on
b oth fork leg s equally, otherwise
poor han dlin g an d loss of sta bility
may result.Each front fork leg is equipped with a
spring preload adjusting bolt, the right
front fork leg is equipped with a re-
bound damping force adjusting screw
and the left front fork leg with a com-
pression damping force adjusting
screw.NOTICE
ECA10102
To avoi d d amag ing the mechanism,
d o not attempt to turn b eyond the
maximum or minimum settin gs.Sprin g preloa d
Turn the adjusting bolt in direction (a)
to increase the spring preload.
Turn the adjusting bolt in direction (b)
to decrease the spring preload. The spring preload setting is deter-
mined by measuring distance A,
shown in the illustration. The shorter
distance A is, the higher the spring pre-
load; the longer distance A is, the lower
the spring preload.
Re
boun d d ampin g force
The rebound damping force is adjust-
ed on the right fork leg only.
Turn the adjusting screw in direction (a)
to increase the rebound damping for-
ce.
Turn the adjusting screw in direction (b)
to decrease the rebound damping for-
ce.
To set the rebound damping force, turn
the adjuster in direction (a) until it
stops, and then count the clicks in di-
rection (b).
TIPBe sure to perform this adjustment on
the right fork leg.
1. Spring preload adjusting bolt
1. Distance A
(b)
1 1 1
(a)
(b)(a)
1
Sprin
g preloa d settin g:
Minimum (soft):
Distance A = 19.0 mm (0.75 in)
Standard:
Distance A = 15.0 mm (0.59 in)
Maximum (hard): Distance A = 4.0 mm (0.16 in)
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Instrument and control functions
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TIP When turning the damping force
adjuster in direction (a), the 0 click
position and the 1 click position
may be the same.
 When turning the damping force
adjuster in direction (b), it may
click beyond the stated specifica- tions, however such adjustments
are ineffective and may damage
the suspension.
Compression
dampin g force
The compression damping force is ad-
justed on the left fork leg only.
Turn the adjusting screw in direction (a)
to increase the compression damping
force.
Turn the adjusting screw in direction (b)
to decrease the compression damping
force.
To set the compression damping for-
ce, turn the adjuster in direction (a) until
it stops, and then count the clicks in di-
rection (b).TIPBe sure to perform this adjustment on
the left fork leg.
TIP When turning the damping force
adjuster in direction (a), the 0 click
position and the 1 click position
may be the same.
 When turning the damping force
adjuster in direction (b), it may
click beyond the stated specifica-
1. Rebound damping force adjusting screwReboun d d ampin g setting :
Minimum (soft): 11 click(s) in direction (b)
Standard: 6 click(s) in direction (b)
Maximum (hard):
1 click(s) in direction (b)
(b)
1 1 1
(a)
1. Compression damping force adjusting screwCompression dampin g settin g:
Minimum (soft): 11 click(s) in direction (b)
Standard: 6 click(s) in direction (b)
Maximum (hard):
1 click(s) in direction (b)
(b)
1 1 1
(a)
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Instrument and control functions
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4
tions, however such adjustments
are ineffective and may damage
the suspension.
EAU57944
A
djustin g the shock a bsor ber
assemb lyThis shock absorber assembly is
equipped with a spring preload adjust-
ing ring and a rebound damping force
adjusting screw.NOTICE
ECA10102
To avoid d amag ing the mechanism,
d o not attempt to turn b eyond the
maximum or minimum settin gs.Sprin g preloa d
Turn the adjusting ring in direction (a)
to increase the spring preload.
Turn the adjusting ring in direction (b)
to decrease the spring preload.
Align the appropriate notch in the ad-
justing ring with the position indicator
on the shock absorber.
TIPUse the special wrench and extension
bar in the tool kit to make this adjust-
ment.1. Spring preload adjusting ring
2. Extension bar
3. Special wrench
4. Position indicator
Sprin g preloa d settin g:
Minimum (soft): 1
Standard:
4
Maximum (hard): 7
7654321
4
1 1 1
2 2
3 3
(a) (a) (a)
(b) (b) (b)
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Instrument and control functions
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4 Re
boun d d ampin g force
Turn the adjusting screw in direction (a)
to increase the rebound damping for-
ce.
Turn the adjusting screw in direction (b)
to decrease the rebound damping for-
ce.
To set the rebound damping force, turn
the adjuster in direction (a) until it
stops, and then count the turns in di-
rection (b).
TIPWhen turning the damping force ad-
juster in direction (b), it may turn be-
yond the stated specifications,
however such adjustments are ineffec-
tive and may damage the suspension.
WARNING
EWA10222
This shock ab sorber assem bly con-
tains hi ghly pressurize d nitro gen
g as. Rea d an d un derstan d the fol-
lowin g information b efore handlin g
the shock a bsor ber assem bly.
 Do not tamper with or attempt
to open the cylin der assem bly.
 Do not su bject the shock a b-
sor ber assem bly to an open
flame or other hi gh heat source.
This may cause the unit to ex-
plo de due to excessive gas
pressure.
 Do not deform or d amage the
cylin der in any way. Cylin der
d amag e will result in poor
d ampin g performance. 
Do not d ispose of a damag ed or
worn-out shock a bsor ber as-
sem bly y
o

urself. Take the shock
a b sor ber assem bly to a Yamaha
d ealer for any service.
1. Rebound damping force adjusting screwRe boun d d ampin g setting :
Minimum (soft): 2 1/2 turn(s) in direction (b)
Standard: 1 turn(s) in direction (b)
Maximum (hard):
0 turn(s) in direction (b)
1(a)
(b)
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Instrument and control functions
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4
EAU84680
Lu gga ge strap hol dersUse the indicated strap points to se-
cure luggage ties to the vehicle.
EAU77390
Auxiliary DC connectorsThis vehicle is equipped with an auxil-
iary DC connector and a grip warmer
DC connector. Consult your Yamaha
dealer before installing any accesso-
ries.
EAU15306
Si destan dThe sidestand is located on the left
side of the frame. Raise the sidestand
or lower it with your foot while holding
the vehicle upright.TIPThe built-in sidestand switch is part of
the ignition circuit cut-off system,
which cuts the ignition in certain situa-
tions. (See the following section for an
explanation of the ignition circuit cut-
off system.)
WARNING
EWA10242
The vehicle must not be ri dden with
the si destan d d own, or if the si de-
stan d cannot b e properly move d up
(or does not stay up), otherwise the
si destan d coul d contact the g round
an d d istract the operator, resultin g
in a possib le loss of control.
Yamaha’s ig nition circuit cut-off
system has been desi gne d to assist
the operator in fulfillin g the respon-
si bility of raisin g the sid estand b e-
fore startin g off. Therefore, check
1. Luggage strap holder
1 1 1
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Instrument and control functions
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4 this system reg
ularly and have a
Yamaha dealer repair it if it does not
function properly.
EAU57952
I g nition circuit cut-off systemThis system prevents in-gear engine
starts unless the clutch lever is pulled
and the sidestand is up. Also, it will
stop the running engine should the
sidestand be lowered while the trans-
mission is in gear.
Periodically check this system via the
following procedure.TIP This check is most reliable if per-
formed with a warmed-up engine.
 See pages 4-2 and 4-3 for switch
operation information.
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