2020 YAMAHA MT-03 light

Periodic maintenance and adjustment
6-12
6
EAU20071
Coolant
The coolant level should be checked
before each ride. In addition, the cool-
ant must be changed at the intervals
specified in the periodic maintenance
and lubrication chart.
EAU38176To check the coolant level
1. Place the vehicle on a level sur-
face and hold it in an upright posi-
tion.
TIP
The coolant level must be
checked on a cold engine since
the level varies with engine tem-
perature.
Make sure that the vehicle is posi-
tioned straight up when checking
the coolant level. A slight tilt to the
side can result in a false reading.
2. Check the coolant level in the
coolant reservoir.
TIP
The coolant should be between the
minimum and maximum level marks.
3. If the coolant is at or below the
minimum level mark, remove the
coolant reservoir cover by remov-
ing the bolts, remove the coolant
reservoir cap, and then add cool-
ant to the maximum level mark.
WARNING! Remove only the
coolant reservoir cap. Never at-
tempt to remove the radiator
cap when the engine is hot.
[EWA15162] NOTICE: If coolant is not
available, use distilled water or
soft tap water instead. Do not
use hard water or salt water
since it is harmful to the engine.
If water has been used instead
of coolant, replace it with cool-
ant as soon as possible, other-
wise the cooling system will not
be protected against frost and
corrosion. If water has been
added to the coolant, have a
Yamaha dealer check the anti-
freeze content of the coolant as
soon as possible, otherwise the
effectiveness of the coolant will
be reduced.
[ECA10473]
1. Maximum level mark
2. Minimum level mark
3. Coolant reservoir
1
2
3
1. Bolt
2. Coolant reservoir cover
2
1
UB6WE0E0.book Page 12 Friday, March 27, 2020 11:37 AM

Periodic maintenance and adjustment
6-20
6
EAU36505
Brake light switches
The brake light should come on just
before braking takes effect. The brake
light is activated by switches connect-
ed to the brake lever and brake pedal.
Since the brake light switches are
components of the anti-lock brake sys-
tem, they should only be serviced by a
Yamaha dealer.
EAU22393
Checking the front and rear
brake pads
The front and rear brake pads must be
checked for wear at the intervals spec-
ified in the periodic maintenance and
lubrication chart.
EAU22433Front brake pads
Each front brake pad is provided with
wear indicator grooves, which allow
you to check the brake pad wear with-
out having to disassemble the brake.
To check the brake pad wear, check
the wear indicator grooves. If a brake
pad has worn to the point that the wear
indicator grooves have almost disap-
peared, have a Yamaha dealer replace
the brake pads as a set.
1. Brake pad wear indicator groove
1
1
UB6WE0E0.book Page 20 Friday, March 27, 2020 11:37 AM

Periodic maintenance and adjustment
6-31
6
EAU62776
Replacing the fuses
The 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.
To access the main fuse, proceed as
follows.
1. Remove the passenger seat. (See
page 3-17.)
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.
TIP
To access the fuse box, remove the
center cover. (See page 3-17.)
1. Quick fastener
2. Tray
1. Starter relay cover
2. Starter relay coupler
3. Main fuse
4. Spare main fuse
2
1
1
2
3
4
1. Fuse box
1. Ignition fuse
2. Signaling system fuse
3. ABS control unit fuse
4. Headlight fuse
5. Backup fuse (for clock)
6. Radiator fan motor fuse
7. Spare fuse
1
71
2
3
5
6
4
UB6WE0E0.book Page 31 Friday, March 27, 2020 11:37 AM

Periodic maintenance and adjustment
6-32
6
If a fuse is blown, replace it as follows.
1. Turn the main switch off and turn
off the electrical circuit in ques-
tion.
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 main switch on 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.
1. Fuse box 2
1. Spare fuse
2. ABS solenoid fuse
3. ABS motor fuse
1
123
Specified fuses:
Main fuse:
30.0 A
Headlight fuse:
7.5 A
Signaling system fuse:
15.0 A
Ignition fuse:
15.0 A
Radiator fan motor fuse:
7.5 A
ABS motor fuse:
30.0 A
ABS solenoid fuse:
15.0 A
ABS control unit fuse:
7.5 A
Backup fuse:
7.5 A
UB6WE0E0.book Page 32 Friday, March 27, 2020 11:37 AM

Periodic maintenance and adjustment
6-33
6
EAU80380
Vehicle lights
Except for the license plate light bulb,
this model’s lights are all LED.
If an LED light does not come on,
check the fuses and then have a
Yamaha dealer check the vehicle. If the
license plate light does not come on,
check and replace the bulb. (See page
6-33.)
NOTICE
ECA16581
Do not affix any type of tinted film or
stickers to the headlight lens.
EAU62670
Replacing the license plate
light bulb
1. 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. Headlight (high beam)
2. Headlight (low beam)
3. Auxiliary light
3
12
1. Mudguard
2. Quick fastener
1. Bolt
2. Screw
3. Rear fender lower panel
1
2
3
2
1
2
2 1
UB6WE0E0.book Page 33 Friday, March 27, 2020 11:37 AM

Periodic maintenance and adjustment
6-34
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 motorcycle
Since 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 placing
a jack either under each side of the
frame in front of the rear wheel or under
each side of the swingarm.
1. License plate light bulb
2. License plate light bulb socket
2
1
UB6WE0E0.book Page 34 Friday, March 27, 2020 11:37 AM

Periodic maintenance and adjustment
6-35
6
EAU25872
Troubleshooting
Although 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
heaters or furnaces. Gasoline or
gasoline vapors can ignite or ex-
plode, causing severe injury or prop-
erty damage.
UB6WE0E0.book Page 35 Friday, March 27, 2020 11:37 AM

Motorcycle care and storage
7-2
7 harsh chemicals, including
strong acidic wheel cleaners,
especially on spoke or magne-
sium wheels.
harsh chemicals, abrasive
cleaning compounds, or wax on
matte-finished parts. Brushes
can scratch and damage the
matte-finish, use soft sponge or
towel only.
towels, sponges, or brushes
contaminated with abrasive
cleaning products or strong
chemicals such as, solvents,
gasoline, rust removers, brake
fluid, or antifreeze, etc.
Before washing
1. Park the vehicle out of direct sun-
light and allow it to cool. This will
help avoid water spots.
2. Make sure all caps, covers, elec-
trical couplers and connectors are
tightly installed.
3. Cover the muffler end with a plas-
tic bag and a strong rubber band.
4. Pre-soak stubborn stains like in-
sects or bird droppings with a wet
towel for a few minutes.
5. Remove road grime and oil stains
with a quality degreasing agent
and a plastic-bristle brush or
sponge. NOTICE: Do not use
degreasing agent on areas re-
quiring lubrication such as
seals, gaskets, and wheel axles.
Follow product instructions.
[ECA26290]
Washing
1. Rinse off any degreaser and spray
down the vehicle with a garden
hose. Use only enough pressure
to do the job. Avoid spraying wa-
ter directly into the muffler, instru-
ment panel, air inlet, or other inner
areas such as underseat storage
compartments.
2. Wash the vehicle with a quality au-
tomotive-type detergent mixed
with cool water and a soft, clean
towel or sponge. Use an old tooth-
brush or plastic-bristle brush for
hard-to-reach places. NOTICE:
Use cold water if the vehicle has
been exposed to salt. Warm wa-
ter will increase salt’s corrosive
properties.
[ECA26301]
3. For windshield-equipped vehicles:
Clean the windshield with a soft
towel or sponge dampened with
water and a pH neutral detergent.
If necessary, use a high-quality
windshield cleaner or polish for
motorcycles. NOTICE: Never use
any strong chemicals to clean
the windshield. Additionally,
some cleaning compounds for
plastic may scratch the wind-
shield, so be sure to test all
cleaning products before gen-
eral application.
[ECA26310]
4. Rinse off thoroughly with clean
water. Be sure to remove all deter-
gent residues, as they can be
harmful to plastic parts.
After washing
1. Dry the vehicle with a chamois or
absorbent towel, preferably mi-
crofiber terrycloth.
UB6WE0E0.book Page 2 Friday, March 27, 2020 11:37 AM