YAMAHA MT-25 2016 Manual PDF

Periodic maintenance and adjustment
6-28
6
EAU62521
BatteryThe battery is located under the rider
seat. (See page 3-16.)
This model is equipped with a VRLA
(Valve Regulated Lead Acid) battery.
There is no need to check the electro-
lyte or to add distilled water. However,
the battery lead connections need to
be checked and, if necessary, tight-
ened.
WARNING
EWA10761
Electrolyte is poisonous and
dangerous since it contains sul-
furic acid, which causes severeburns. Avoid any contact with
skin, eyes or clothing and al-
ways shield your eyes when
working near batteries. In case
of contact, administer the fol-
lowing FIRST AID.
EXTERNAL: Flush with plenty
of water.
INTERNAL: Drink large quan-
tities of water or milk and im-
mediately call a physician.
EYES: Flush with water for 15
minutes and seek prompt
medical attention.
Batteries produce explosive hy-
drogen gas. Therefore, keep
sparks, flames, cigarettes, etc.,
away from the battery and pro-
vide sufficient ventilation when
charging it in an enclosed
space.
KEEP THIS AND ALL BATTER-
IES OUT OF THE REACH OF
CHILDREN.
NOTICE
ECA10621
Never attempt to remove the battery
cell seals, as this would permanently
damage the battery.To charge the battery
Have a Yamaha dealer charge the bat-
tery as soon as possible if it seems to
have discharged. Keep in mind that the
battery tends to discharge more quick-
ly if the vehicle is equipped with op-
tional electrical accessories.NOTICE
ECA16522
To charge a VRLA (Valve Regulated
Lead Acid) battery, a special (con-
stant-voltage) battery charger is re-
quired. Using a conventional battery
charger will damage the battery.To store the battery
1. If the vehicle will not be used for
more than one month, remove the
battery, fully charge it, and then
place it in a cool, dry place.
NOTICE: When removing the
battery, be sure the key is
1. Battery
2. Negative battery lead (black)
3. Positive battery lead (red)
1
2
3
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Periodic maintenance and adjustment
6-29
6turned to “ ”, then disconnect
the negative lead before discon-
necting the positive lead.
[ECA17712]
2. If the battery will be stored for
more than two months, check it at
least once a month and fully
charge it if necessary.
3. Fully charge the battery before in-
stallation. NOTICE: When install-
ing the battery, be sure the key
is turned to “ ”, then connect
the positive lead before con-
necting the negative lead.
[ECA17722]
4. After installation, make sure that
the battery leads are properly con-
nected to the battery terminals.NOTICE
ECA16531
Always keep the battery charged.
Storing a discharged battery can
cause permanent battery damage.
EAU62773
Replacing the fusesThe main fuse is located under the
passenger seat. The fuse box, which
contains the fuses for the individual cir-
cuits, is located behind the center pan-
el. (See page 3-16.)
To access the main fuse, proceed as
follows.
1. Remove the passenger seat. (See
page 3-16.)
2. Remove the tray by removing the
quick fasteners.
3. Pull back the starter relay cover.4. Disconnect the starter relay cou-
pler by pressing from both sides.
5. Connect the starter relay coupler,
and then slide the cover to its orig-
inal position.
6. Place the tray in its original posi-
tion, and then install the quick fas-
teners.
7. Install the passenger seat.
TIPTo access the fuse box, remove the
center cover. (See page 3-16.)
1. Quick fastener
2. Tray
21
1. Starter relay cover
2. Starter relay coupler
3. Main fuse
4. Spare main fuse
1
2
34
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Periodic maintenance and adjustment
6-30
6
If a fuse is blown, replace it as follows.1. Turn the key to “ ” and turn off
the electrical circuit in question.
2. Remove the blown fuse, and then
install a new fuse of the specified
amperage. WARNING! Do not
use a fuse of a higher amperage
rating than recommended to
avoid causing extensive dam-
age to the electrical system and
possibly a fire.
[EWA15132]
3. Turn the key to “ ” and turn on
the electrical circuit in question to
check if the device operates.
4. If the fuse immediately blows
again, have a Yamaha dealer
check the electrical system.
EAU68470
Replacing the headlight bulbThis model is equipped with halogen
bulb headlight. If a headlight bulb
burns out, have a Yamaha dealer re-
place it and, if necessary, adjust the
headlight beam.NOTICE
ECA17871
Headlight lens:
Do not affix any type of tinted film or
stickers to the headlight lens.
Do not use a headlight bulb of a
wattage higher than specified.
1. Fuse box
1. Ignition fuse
2. Signaling system fuse
3. Backup fuse (for clock)
4. Headlight fuse
5. Radiator fan motor fuse
6. Spare fuse
16
12345
Specified fuses:
Main fuse:
30.0 A
Headlight fuse:
15.0 A
Signaling system fuse:
7.5 A
Ignition fuse:
15.0 A
Radiator fan motor fuse:
7.5 A
Backup fuse:
7.5 A
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Periodic maintenance and adjustment
6-31
6
EAU44941
Auxiliary lightThis model is equipped with an LED-
type auxiliary light.
If the auxiliary light does not come on,
have a Yamaha dealer check it.
EAU24182
Tail/brake lightThis model is equipped with an LED-
type tail/brake light.
If the tail/brake light does not come on,
have a Yamaha dealer check it.
EAU62590
Replacing a turn signal light
bulb1. Remove the turn signal light lens
by removing the screw.
2. Remove the turn signal light bulb
socket (together with the bulb) by
turning it counterclockwise.
1. Auxiliary light
1 1
1. Turn signal light lens
2. Screw
1
2
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Periodic maintenance and adjustment
6-32
6 3. Remove the burnt-out bulb by
pulling it out.
4. Insert a new bulb into the socket.
5. Install the socket (together with
the bulb) by turning it clockwise.
6. Install the turn signal light lens by
installing the screw. NOTICE: Do
not overtighten the screw, oth-
erwise the lens may break.
[ECA11192]EAU62670
Replacing the license plate
light bulb1. Remove the mudguard by remov-
ing the quick fasteners.
2. Remove the rear fender lower
panel by removing the bolts and
screws.3. Remove the license plate light
bulb socket (together with the
bulb) by pulling it out.
4. Remove the burnt-out bulb by
pulling it out.
1. Turn signal light bulb socket
1
1. Mudguard
2. Quick fastener
1
2
1. Bolt
2. Screw
3. Rear fender lower panel
1. License plate light bulb
2. License plate light bulb socket
3
2
1
2
2 121
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Periodic maintenance and adjustment
6-33
65. Insert a new bulb into the socket.
6. Install the socket (together with
the bulb) by pushing it in.
7. Install the rear fender lower panel
by installing the bolts and screws.
8. Install the mudguard by installing
the quick fasteners.
EAU24351
Supporting the motorcycleSince this model is not equipped with a
centerstand, follow these precautions
when removing the front and rear
wheel or performing other mainte-
nance requiring the motorcycle to
stand upright. Check that the motorcy-
cle is in a stable and level position be-
fore starting any maintenance. A
strong wooden box can be placed un-
der the engine for added stability.
To service the front wheel
1. Stabilize the rear of the motorcy-
cle by using a motorcycle stand
or, if an additional motorcycle
stand is not available, by placing a
jack under the frame in front of the
rear wheel.
2. Raise the front wheel off the
ground by using a motorcycle
stand.
To service the rear wheel
Raise the rear wheel off the ground by
using a motorcycle stand or, if a motor-
cycle stand is not available, by placinga jack either under each side of the
frame in front of the rear wheel or under
each side of the swingarm.
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Periodic maintenance and adjustment
6-34
6
EAU24361
Front wheel
EAUN0670
To remove the front wheel
WARNING
EWA10822
To avoid injury, securely support the
vehicle so there is no danger of it
falling over.1. Loosen the axle nut and the brake
caliper bolts.2. Lift the front wheel off the ground
according to the procedure in the
previous section “Supporting the
motorcycle”.
3. Remove the brake caliper (togeth-
er with the reflector on each side)
by removing the bolts. NOTICE:
Do not apply the brake after the
brake caliper has been re-
moved, otherwise the brake
pads will be forced shut.
[ECA22240]
4. Remove the axle nut.
5. Pull the wheel axle out, and then
remove the wheel.
To install the front wheel
1. Lift the wheel up between the fork
legs.2. Insert the wheel axle from the right
side and then install the axle nut.
3. Install the brake caliper (together
with the reflectors on each side)
by installing the bolts.
TIPMake sure that there is enough space
between the brake pads before install-
ing the brake caliper onto the brake
disc.4. Lower the front wheel so that it is
on the ground, and then put the
sidestand down.
5. Tighten the wheel axle and the
brake caliper bolts to the specified
torques.
6. Push down hard on the handlebar
several times to check for proper
fork operation.
1. Axle nut
1
1. Brake caliper bolt
1
Tightening torques:
Wheel axle:
60 Nm (6.0 m·kgf, 44 ft·lbf)
Brake caliper bolt:
35 Nm (3.5 m·kgf, 25 ft·lbf)
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Periodic maintenance and adjustment
6-35
6
EAU25081
Rear wheel
EAU62612
To remove the rear wheel
WARNING
EWA10822
To avoid injury, securely support the
vehicle so there is no danger of it
falling over.1. Remove the drive chain puller cap,
and then loosen the locknut and
drive chain slack adjusting nut on
each side of the swingarm.2. Loosen the axle nut.
3. Lift the rear wheel off the ground
according to the procedure on
page 6-33.
4. Remove the axle nut.
5. Push the wheel forward, and then
remove the drive chain from the
rear sprocket.
TIPThe drive chain does not need to be
disassembled in order to remove and
install the rear wheel.6. While supporting the brake caliper
and slightly lifting the wheel, pull
the wheel axle out.TIPA rubber mallet may be useful to tap
the wheel axle out.7. Remove the wheel. NOTICE: Do
not apply the brake after the
wheel and brake disc have been
removed, otherwise the brake
pads will be forced shut.
[ECA11073]
1. Wheel axle
2. Drive chain slack adjusting nut
3. Locknut
4. Drive chain puller cap
342
1
1. Axle nut
1
1. Wheel axle
2. Washer
1 2
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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)
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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.
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