2016 YAMAHA MT-25 check engine light

Table of contentsSafety information............................ 1-1
Description....................................... 2-1
Left view ......................................... 2-1
Right view ....................................... 2-2
Controls and instruments ............... 2-3
Instrument and control functions... 3-1
Main switch/steering lock............... 3-1
Indicator lights and warning
lights............................................ 3-2
Multi-function meter unit ................ 3-4
Handlebar switches ...................... 3-10
Clutch lever .................................. 3-11
Shift pedal .................................... 3-12
Brake lever.................................... 3-12
Brake pedal .................................. 3-12
Fuel tank cap ................................ 3-13
Fuel ............................................... 3-13
Fuel tank breather hose and
overflow hose ............................ 3-15
Catalytic converter ....................... 3-15
Seats ............................................ 3-16
Helmet holders ............................. 3-17
Storage compartment .................. 3-18
Adjusting the shock absorber
assembly ................................... 3-18
Luggage strap holders ................. 3-19
Sidestand ..................................... 3-19
Ignition circuit cut-off system ....... 3-20For your safety – pre-operation
checks............................................... 4-1
Operation and important riding
points................................................. 5-1
Starting the engine .......................... 5-1
Shifting ............................................ 5-2
Tips for reducing fuel
consumption ................................ 5-3
Engine break-in ............................... 5-3
Parking ............................................ 5-4
Periodic maintenance and
adjustment........................................ 6-1
Owner’s tool kit ............................... 6-1
Periodic maintenance chart for
the emission control system ........ 6-3
General maintenance and
lubrication chart ........................... 6-4
Checking the spark plugs ............... 6-8
Engine oil and oil filter cartridge...... 6-9
Coolant.......................................... 6-12
Replacing the air filter element
and cleaning the check hose..... 6-13
Checking the throttle grip
free play ..................................... 6-15
Valve clearance ............................. 6-15
Tires .............................................. 6-15
Cast wheels................................... 6-17
Adjusting the clutch lever
free play ..................................... 6-17Checking the brake lever
free play..................................... 6-18
Brake light switches ..................... 6-19
Checking the front and rear
brake pads ................................ 6-19
Checking the brake fluid level ...... 6-20
Changing the brake fluid .............. 6-21
Drive chain slack........................... 6-21
Cleaning and lubricating the
drive chain ................................. 6-23
Checking and lubricating the
cables ........................................ 6-24
Checking and lubricating the
throttle grip and cable ............... 6-24
Checking and lubricating the
brake and shift pedals............... 6-24
Checking and lubricating the
brake and clutch levers ............. 6-25
Checking and lubricating the
sidestand................................... 6-26
Lubricating the swingarm
pivots......................................... 6-26
Checking the front fork ................. 6-26
Checking the steering................... 6-27
Checking the wheel bearings ....... 6-27
Battery .......................................... 6-28
Replacing the fuses ...................... 6-29
Replacing the headlight bulb ........ 6-30
Auxiliary light ................................ 6-31
Tail/brake light .............................. 6-31UB04E0E0.book Page 1 Wednesday, September 2, 2015 3:51 PM

Safety information
1-5
1operator and may limit control
ability, therefore, such accesso-
ries are not recommended.
Use caution when adding electri-
cal accessories. If electrical ac-
cessories exceed the capacity of
the motorcycle’s electrical sys-
tem, an electric failure could re-
sult, which could cause a
dangerous loss of lights or engine
power.
Aftermarket Tires and Rims
The tires and rims that came with your
motorcycle were designed to match
the performance capabilities and to
provide the best combination of han-
dling, braking, and comfort. Other
tires, rims, sizes, and combinations
may not be appropriate. Refer to page
6-15 for tire specifications and more in-
formation on replacing your tires.
Transporting the Motorcycle
Be sure to observe following instruc-
tions before transporting the motorcy-
cle in another vehicle.
Remove all loose items from the
motorcycle.Check that the fuel cock (if
equipped) is in the “OFF” position
and that there are no fuel leaks.
Point the front wheel straight
ahead on the trailer or in the truck
bed, and choke it in a rail to pre-
vent movement.
Shift the transmission in gear (for
models with a manual transmis-
sion).
Secure the motorcycle with tie-
downs or suitable straps that are
attached to solid parts of the mo-
torcycle, such as the frame or up-
per front fork triple clamp (and not,
for example, to rubber-mounted
handlebars or turn signals, or
parts that could break). Choose
the location for the straps carefully
so the straps will not rub against
painted surfaces during transport.
The suspension should be com-
pressed somewhat by the tie-
downs, if possible, so that the mo-
torcycle will not bounce exces-
sively during transport.
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Description
2-2
2
EAU10421
Right view
1
98 76 5 23
4
1. Fuse box (page 6-29)
2. Battery (page 6-28)
3. Fuel tank cap (page 3-13)
4. Headlight (page 6-30)
5. Engine oil filler cap (page 6-9)
6. Engine oil level check window (page 6-9)
7. Brake pedal (page 3-12)
8. Rear brake light switch (page 6-19)9. Rear brake fluid reservoir (page 6-20)UB04E0E0.book Page 2 Wednesday, September 2, 2015 3:51 PM

Instrument and control functions
3-2
3 To unlock the steering
1. Insert the key.
2. With the key in the “LOCK” posi-
tion, push the key in and turn it
to “ ”.
EAU49398
Indicator lights and warning
lights
EAU11022
Turn signal indicator light “ ”
This indicator light flashes when a turn
signal light is flashing.
EAU11061
Neutral indicator light “ ”
This indicator light comes on when the
transmission is in the neutral position.
EAU11081
High beam indicator light “ ”
This indicator light comes on when the
high beam of the headlight is switched
on.
EAU62530
Oil pressure warning light “ ”
This warning light comes on if the en-
gine oil pressure is low.
The electrical circuit of the warning
light can be checked by turning the key
to “ ”. The warning light should come
on and remain on until the engine is
started.
If the warning light does not come on
initially when the key is turned to “ ”,
have a Yamaha dealer check the elec-
trical circuit.NOTICE
ECA21210
If the warning light comes on when
the engine is running, stop the en-
gine immediately and check oil level.
If the oil level is below the minimum
level, add sufficient oil of the recom-
mended t y p e t o r a i s e i t u p t o t h e c o r -
rect level. If the oil pressure warning
light remains on even if the oil level
1. Push.
2. Turn.12
1. Neutral indicator light Ž
2. High beam indicator light Ž
3. Turn signal indicator light Ž
4. Shift timing indicator light
5. Oil pressure warning light Ž
6. Engine trouble warning light Ž
6
5
3
1
2
4
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Instrument and control functions
3-3
3is correct, immediately turn the en-
gine off and have a Yamaha dealer
check the vehicle.
TIPIf the warning light does not go off after
starting the engine, check the engine
oil level and add oil if necessary. (See
page 6-9.)
If the warning light remains on after
adding engine oil, have a Yamaha
dealer check the vehicle.
EAU62790
Engine trouble warning light “ ”
This warning light comes on or flashes
if a problem is detected in the electrical
circuit monitoring the engine. If this oc-
curs, have a Yamaha dealer check the
self-diagnosis system. (See page 3-10
for an explanation of the self-diagnosis
device.)
The electrical circuit of the warning
light can be checked by turning the key
to “ ”. The warning light should come
on for a few seconds, and then go off.If the warning light does not come on
initially when the key is turned to “ ”,
or if the warning light remains on, have
a Yamaha dealer check the electrical
circuit.
TIPThe engine trouble warning light will
come on while the start switch is
pushed, but this does not indicate a
malfunction.
EAU62470
Shift timing indicator light
This indicator light can be set to come
on and go off at the desired engine
speeds and is used to inform the rider
when it is time to shift to the next high-
er gear. (See page 3-8 for a more de-
tailed explanation of this indicator light
and on how to set it.)
The electrical circuit of the indicator
light can be checked by turning the key
to “ ”. The indicator light should
come on for a few seconds, and then
go off.If the indicator light does not come on
initially when the key is turned to “ ”,
or if the indicator light remains on, have
a Yamaha dealer check the electrical
circuit.
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Instrument and control functions
3-10
3 To adjust the brightness
1. Push the “RES” button to select
the desired shift indicator light
brightness level.
2. Push the “SEL” button to confirm
the selected brightness level. The
display exits the shift timing light
control mode and returns to the
standard multi-function display
mode.
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.
NOTICE
ECA11591
If the display indicates an error
code, the vehicle should be checked
as soon as possible in order to avoid
engine damage.
EAU1234H
Handlebar switchesLeft
Right
1. Engine trouble warning light “ ”
2. Error code display
2
1
1.
2. Dimmer switch / Ž
3. Turn signal switch / Ž
4. Horn switch Ž
1. Engine stop switch / Ž
2. Start switch Ž
4312
21
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Operation and important riding points
5-1
5
EAU15952
Read the Owner’s Manual carefully to
become familiar with all controls. If
there is a control or function you do not
understand, ask your Yamaha dealer.
WARNING
EWA10272
Failure to familiarize yourself with
the controls can lead to loss of con-
trol, which could cause an accident
or injury.
EAU62513
TIPThis model is equipped with:
a lean angle sensor to stop the en-
gine in case of a turnover. In this
case, the display will indicate error
code 30, but this is not a malfunc-
tion. Turn the key to “ ” and then
to “ ” to clear the error code.
Failing to do so will prevent the en-
gine from starting even though the
engine will crank when pushing
the start switch.
an engine auto-stop system. The
engine stops automatically if left
idling for 20 minutes. If the engine
stops, simply push the start
switch to restart the engine.
EAUN0680
Starting the engineIn order for the ignition circuit cut-off
system to enable starting, one of the
following conditions must be met:
The transmission is in the neutral
position.
The transmission is in gear with
the clutch lever pulled and the
sidestand up.
See page 3-20 for more informa-
tion.
1. Turn the key to “ ” and make
sure that the engine stop switch is
set to “ ”.
The engine trouble warning light
should come on for a few sec-
onds, then go off. NOTICE: If the
warning light does not go off,
have a Yamaha dealer check its
electrical circuit.
[ECAT1121]
2. Shift the transmission into the
neutral position. The neutral indi-
cator light should come on. If not,
ask a Yamaha dealer to check the
electrical circuit.
3. Start the engine by pushing the
start switch.
UB04E0E0.book Page 1 Wednesday, September 2, 2015 3:51 PM

Operation and important riding points
5-3
5
EAU16811
Tips for reducing fuel con-
sumptionFuel consumption depends largely on
your riding style. Consider the follow-
ing tips to reduce fuel consumption:
Shift up swiftly, and avoid high en-
gine speeds during acceleration.
Do not rev the engine while shift-
ing down, and avoid high engine
speeds with no load on the en-
gine.
Turn the engine off instead of let-
ting it idle for an extended length
of time (e.g., in traffic jams, at traf-
fic lights or at railroad crossings).
EAU16842
Engine break-inThere is never a more important period
in the life of your engine than the period
between 0 and 1600 km (1000 mi). For
this reason, you should read the fol-
lowing material carefully.
Since the engine is brand new, do not
put an excessive load on it for the first
1600 km (1000 mi). The various parts in
the engine wear and polish themselves
to the correct operating clearances.
During this period, prolonged full-throt-
tle operation or any condition that
might result in engine overheating
must be avoided.
EAU17094
0–1000 km (0–600 mi)
Avoid prolonged operation above 7000
r/min. NOTICE: After 1000 km (600
mi) of operation, the engine oil must
be changed and the oil filter car-
tridge or element replaced.
[ECA10303]
1000–1600 km (600–1000 mi)
Avoid prolonged operation above 8400
r/min.1600 km (1000 mi) and beyond
The vehicle can now be operated nor-
mally.
NOTICE
ECA10311
Keep the engine speed out of
the tachometer red zone.
If any engine trouble should oc-
cur during the engine break-in
period, immediately have a
Yamaha dealer check the vehi-
cle.
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