2020 YAMAHA MT-125 engine

Instrument and control functions
3-5
3 4. Use the “RESET” button to set the
minutes.
5. Push the “SELECT” button to start
the clock.
Fuel meter
The fuel meter indicates the amount of
fuel in the fuel tank. The display seg-
ments of the fuel meter disappear to-
wards “E” (empty) as the fuel level
decreases. When the last segment
start flashing, refuel as soon as possi-
ble.
When the key is turned to “ ”, the dis-
play segments of the fuel meter will
sweep once across the fuel level range
and then return to the current amount
in order to test the electrical circuit.
TIP
The fuel meter is equipped with a self-
diagnosis function. If a problem is de-
tected in the fuel meter electrical cir-
cuit, the fuel meter will flash
repeatedly. If this occurs, have a
Yamaha dealer check the vehicle.
VVA indicator
This model is equipped with variable
valve actuation (VVA) for good fuel
economy and acceleration in both the
low-speed and high-speed ranges.
The VVA indicator comes on when the
variable valve actuation system has
switched to the high-speed range.
Tachometer
The tachometer allows the rider to
monitor the engine speed and keep it
within the ideal power range.
NOTICE
ECA23050
Do not operate the engine in the ta-
chometer high-r/min zone.
High-r/min zone: 11000 r/min and
above
1. Fuel meter
ZAUM15701
1. VVA (variable valve actuation) indicator
1. Tachometer
2. Tachometer red zone
ZAUM1571
1
ZAUM1572
1
2
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Instrument and control functions
3-9
3 Average speed mode
Shows the vehicle’s traveling speed
since it was last reset.
To reset the average speed display,
push and hold the “RESET” button un-
til the average speed flashes, and then
push the button again .
Brightness screen and shift timing
indicator light control mode
This mode cycles through five control
functions in the order listed below.
Brightness screen: the multi-func-
tion meter unit can be adjusted for
the brightness screen.
Shift timing light flashing pattern:
this function allows you to choose
whether or not the indicator light
will come on and whether it should
flash or stay on when activated.Shift timing light activation point:
this function allows you to select
the engine speed at which the in-
dicator light is activated.
Shift timing light deactivation
point: this function allows you to
select the engine speed at which
the indicator light is deactivated.
Shift timing light brightness: this
function allows you to adjust the
brightness of the indicator light.
To adjust the brightness screen and
shift timing indicator light
1. Turn the key to “ ”.
2. Push and hold the “SELECT” but-
ton.
3. Turn the key to “ ”, and then re-
lease the “SELECT” button after
five seconds. After that push the
“SELECT” button again. The
brightness screen can now be ad-
justed.
To set the brightness screen
1. Push the “RESET” button to select
the desired brightness level.
2. Push the “SELECT” button to
confirm the selected brightness
screen level. The brightness
screen light changes to the shift
flashing pattern setting mode.
To set the shift flashing pattern
1. Push the “RESET” button to select
one of the following flashing pat-
tern settings:
On: the indicator light stays
on when activated. (This set-
ting is selected when the indi-
cator light stays on.)
1. Average speed display
1. Shift timing indicator light
2. Brightness level display
ZAUM15791
ZAUM15802
1
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Instrument and control functions
3-10
3Flash: the indicator light
flashes when activated. (This
setting is selected when the
indicator light flashes four
times per second.)
Off: the indicator light is deac-
tivated; in other words, it
does not come on or flash.
(This setting is selected when
the indicator light flashes
once every two seconds.)
2. Push the “SELECT” button to con-
firm the selected flashing pattern.
The shift timing indicator light
changes to the activation point
setting mode.
The tachometer will show the current
setting r/min for the activation point
and deactivation point setting modes.
To set the shift activation point
TIP
The shift timing indicator light activa-
tion point can be set between 9000
r/min and 13000 r/min. The indicator
light can be set in increments of 500
r/min.
1.
the desired engine speed for acti-
vating the indicator light.
2.
firm the selected engine speed.
The control mode changes to the
deactivation point setting mode.To set the shift deactivation point
TIP
The shift timing indicator light de-
activation point can be set be-
tween 9000 r/min and 13000
r/min. The indicator light can be
set in increments of 500 r/min.
Be sure to set the deactivation
point to a higher engine speed
than for the activation point, other-
wise the shift timing indicator light
will not come on.
1. Push the “RESET” button to select
the desired engine speed for de-
activating the indicator light.
2. Push the “SELECT” button to con-
firm the selected engine speed.
The control mode changes to the
brightness setting mode.
To adjust the shift brightness
1. Push the “RESET” button to select
the desired shift indicator light
brightness level.
2. Push the “SELECT” button to con-
firm the selected brightness level.
The display exits the shift timing
light control mode and returns to
the standard multi-function dis-
play mode.
Welcome screen
The welcome screen greets the rider
when the key is turned to “ ” with the
messages “Hi Buddy” and “see you”
when the key is turned to “ ”. The
user name “Buddy” is set as the facto-
ry default, but it can be set to your
name.
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Instrument and control functions
3-11
3 To set the user name
1. Turn the key to “ ”.
2. Push and hold the “RESET” but-
ton.
3. Turn the key to “ ”, and then re-
lease the “RESET” button after
four seconds.
4. When the first character starts
flashing, push the “SELECT” but-
ton to display the next alpha nu-
merical character, push the
“RESET” button to switch to the
previous character.
5. Push and hold the “SELECT” but-
ton to confirm the selected char-
acter. The second character will
start flashing. Repeat this process
for all six characters. After the
sixth character is set, all charac-
ters will flash twice and the setting
mode will automatically end.Self-diagnosis device
This model is equipped with a self-di-
agnosis device for various electrical
circuits.
If a problem is detected in any of those
circuits, the engine trouble warning
light will come on and the display will
indicate an error code.
If the display indicates any error codes,
note the code number, and then have a
Yamaha dealer check the vehicle.
NOTICE
ECA11591
If the display indicates an error
code, the vehicle should be checked
as soon as possible in order to avoid
engine damage.
1. Hyphen
2. Space
ZAUM1581
AB C Y Z
0 1 2 9
-_
12
1. Self-diagnosis device
ZAUM15821
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Instrument and control functions
3-12
3
EAU1234M
Handlebar switches
Left
Right
EAU12352Pass switch “ ”
Press this switch to flash the headlight.
TIP
When the dimmer switch is set
to Ž, the passing switch has no ef-
fect.
EAU12402Dimmer switch “ / ”
Set this switch to “ ” for the high
beam and to “ ” for the low beam.
EAU12461Turn signal switch “ / ”
To signal a right-hand turn, push this
switch to “ ”. To signal a left-hand
turn, push this switch to “ ”. When
released, the switch returns to the cen-
ter position. To cancel the turn signal
lights, push the switch in after it has re-
turned to the center position.
EAU12501Horn switch “ ”
Press this switch to sound the horn.
EAU68270Start/Engine stop switch “ / / ”
To crank the engine with the starter,
set this switch to “ ”, and then slide
the switch toward “ ”. See page 5-2
for starting instructions prior to starting
the engine.
Set this switch to “ ” to stop the en-
gine in case of an emergency, such as
when the vehicle overturns or when the
throttle cable is stuck.
1. Pass switch “ ”
2. Dimmer switch “ / ”
3. Horn switch “ ”
4. Turn signal switch “ / ”
1. Start/Engine stop switch “ / / ”
1
2
3
4
1
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Instrument and control functions
3-13
3
EAU12823
Clutch lever
To disengage the drivetrain from the
engine, such as when shifting gears,
pull the clutch lever toward to the han-
dlebar. Release the lever to engage the
clutch and transmit power to the rear
wheel.
TIP
The lever should be pulled rapidly and
released slowly for smooth shifting.
(See page 5-4.)
EAU12876
Shift pedal
The shift pedal is located on the left
side of the motorcycle. To shift the
transmission to a higher gear, move
the shift pedal up. To shift the trans-
mission to a lower gear, move the shift
pedal down. (See page 5-4.)
1. Clutch lever
1
1. Shift pedal
1
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Instrument and control functions
3-16
3
EAU13076
Fuel tank cap
To open the fuel tank cap
Open the fuel tank cap lock cover, in-
sert the key into the lock, and then turn
it 1/4 turn clockwise. The lock will be
released and the fuel tank cap can be
opened.
To close the fuel tank cap
With the key still inserted in the lock,
push down the fuel tank cap. Turn the
key 1/4 turn counterclockwise, remove
it, and then close the lock cover.
TIP
The fuel tank cap cannot be closed un-
less the key is in the lock. In addition,
the key cannot be removed if the cap is
not properly closed and locked.
WARNING
EWA11092
Make sure that the fuel tank cap is
properly closed after filling fuel.
Leaking fuel is a fire hazard.
EAU13213
Fuel
Make sure there is sufficient gasoline in
the tank.
WARNING
EWA10882
Gasoline and gasoline vapors are
extremely flammable. To avoid fires
and explosions and to reduce 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. 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 spilled fuel with a clean,1. Fuel tank cap lock cover
2. Unlock.
1
2
1. Fuel tank filler tube
2. Maximum fuel level
1
2
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Instrument and control functions
3-17
3 dry, soft cloth, since fuel may
deteriorate painted surfaces or
plastic parts.
[ECA10072]
4. Be sure to securely close the fuel
tank cap.
WARNING
EWA15152
Gasoline is poisonous and can
cause injury or death. Handle gaso-
line with care. Never siphon gasoline
by mouth. If you should swallow
some gasoline or inhale a lot of gas-
oline vapor, or get some gasoline in
your eyes, see your doctor immedi-
ately. If gasoline spills on your skin,
wash with soap and water. If gaso-
line spills on your clothing, change
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.
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 unleaded gasoline. The use
of leaded gasoline will cause severe
damage to internal engine parts,
such as the valves and piston rings,
as well as to the exhaust system.
Recommended fuel:
Unleaded gasoline (E10 acceptable)
Octane number (RON):
95
Fuel tank capacity:
10 L (2.6 US gal, 2.2 Imp.gal)
Fuel tank reserve:
3.0 L (0.79 US gal, 0.66 Imp.gal)
E5E10
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