2016 YAMAHA MT-25 maintenance

Periodic maintenance and adjustment
6-36
6 To install the rear wheel
1. Install the wheel and the brake cal-
iper bracket by inserting the wheel
axle from the left-hand side.
TIPMake sure that the slot in the
brake caliper bracket is fit over the
retainer on the swingarm.
Make sure that there is enough
space between the brake pads
before installing the wheel.2. Install the drive chain onto the rear
sprocket.
3. Install the axle nut.4. Lower the rear wheel so that it is
on the ground, and then put the
sidestand down.
5. Adjust the drive chain slack. (See
page 6-21.)
6. Tighten the axle nut, and then
tighten the locknuts to the speci-
fied torques.
7. Install the drive chain puller caps.
EAU25872
TroubleshootingAlthough 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 checking the fuel system, do
not smoke, and make sure there are
no open flames or sparks in the ar-
ea, including pilot lights from water
1. Retainer
2. Slot
1
2
Tightening torques:
Axle nut:
57 Nm (5.7 m·kgf, 41 ft·lbf)
Locknut:
16 Nm (1.6 m·kgf, 12 ft·lbf)
UB04E0E0.book Page 36 Wednesday, September 2, 2015 3:51 PM

Periodic maintenance and adjustment
6-37
6heaters or furnaces. Gasoline or
gasoline vapors can ignite or ex-
plode, causing severe injury or prop-
erty damage.
UB04E0E0.book Page 37 Wednesday, September 2, 2015 3:51 PM

Periodic maintenance and adjustment
6-38
6
EAU42505
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.
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Periodic maintenance and adjustment
6-39
6Engine overheating
WARNING
EWAT1041
Do not remove the radiator cap when the engine and radiator are hot. Scalding hot fluid and steam may be
blown out under pressure, which could cause serious injury. Be sure to wait until the engine has cooled.
Place a thick rag, like a towel, over the radiator cap, and then slowly rotate the cap counterclockwise to the
detent to allow any residual pressure to escape. When the hissing sound has stopped, press down on the cap
while turning it counterclockwise, and then remove the cap.TIPIf coolant is not available, tap water can be temporarily used instead, provided that it is changed to the recommended cool-
ant as soon as possible.
Wait until the
engine has cooled.
Check the coolant level in the
reservoir and radiator.
The coolant level
is OK.The coolant level is low.
Check the cooling system
for leakage.
Have a Yamaha dealer checkand repair the cooling system.Add coolant. (See TIP.)
Start the engine. If the engine overheats again,
have a
Yamaha dealer check
and repair the cooling system.
There is
leakage.
There is
no leakage.
UB04E0E0.book Page 39 Wednesday, September 2, 2015 3:51 PM

10-1
10
Index
AAir filter element and check hose,
replacing and cleaning ....................... 6-13
Auxiliary light ........................................ 6-31BBattery .................................................. 6-28
Brake and clutch levers,
checking and lubricating .................... 6-25
Brake and shift pedals,
checking and lubricating .................... 6-24
Brake fluid, changing............................ 6-21
Brake fluid level, checking.................... 6-20
Brake lever............................................ 3-12
Brake lever free play, checking ............ 6-18
Brake light switches ............................. 6-19
Brake pedal .......................................... 3-12CCables, checking and lubricating ......... 6-24
Care ........................................................ 7-1
Catalytic converter ............................... 3-15
Clutch lever........................................... 3-11
Clutch lever free play, adjusting ........... 6-17
Coolant ................................................. 6-12DDimmer switch...................................... 3-11
Drive chain, cleaning and lubricating ... 6-23
Drive chain slack .................................. 6-21EEngine break-in ...................................... 5-3
Engine oil and oil filter cartridge ............. 6-9
Engine serial number .............................. 9-1
Engine stop switch ............................... 3-11
Engine trouble warning light ................... 3-3
FFront and rear brake pads, checking ... 6-19
Front fork, checking ............................. 6-26
Fuel ...................................................... 3-13
Fuel consumption, tips for reducing ...... 5-3
Fuel tank breather hose and
overflow hose..................................... 3-15
Fuel tank cap........................................ 3-13
Fuses, replacing ................................... 6-29HHandlebar switches ............................. 3-10
Headlight bulb, replacing ..................... 6-30
Helmet holders ..................................... 3-17
High beam indicator light ....................... 3-2
Horn switch .......................................... 3-11IIdentification numbers ........................... 9-1
Ignition circuit cut-off system .............. 3-20
Indicator lights and warning lights ......... 3-2LLicense plate light bulb, replacing ....... 6-32
Luggage strap holders ......................... 3-19MMain switch/steering lock ...................... 3-1
Maintenance and lubrication,
periodic ................................................ 6-4
Maintenance, emission control
system ................................................. 6-3
Matte color, caution ............................... 7-1
Model label............................................. 9-1
Multi-function meter unit ........................ 3-4NNeutral indicator light ............................. 3-2
OOil pressure warning light ....................... 3-2PParking.................................................... 5-4
Part locations.......................................... 2-1
Pass switch........................................... 3-11SSafety information................................... 1-1
Seats ..................................................... 3-16
Shifting.................................................... 5-2
Shift pedal............................................. 3-12
Shift timing indicator light ....................... 3-3
Shock absorber assembly, adjusting ... 3-18
Sidestand.............................................. 3-19
Sidestand, checking and lubricating .... 6-26
Spark plugs, checking ............................ 6-8
Specifications ......................................... 8-1
Starting the engine ................................. 5-1
Start switch ........................................... 3-11
Steering, checking ................................ 6-27
Storage ................................................... 7-4
Storage compartment........................... 3-18
Supporting the motorcycle ................... 6-33
Swingarm pivots, lubricating ................ 6-26TTail/brake light ...................................... 6-31
Throttle grip and cable,
checking and lubricating .................... 6-24
Throttle grip free play, checking ........... 6-15
Tires ...................................................... 6-15
Tool kit .................................................... 6-1
Troubleshooting .................................... 6-36
Troubleshooting charts ......................... 6-38
Turn signal indicator light ....................... 3-2
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