engine overheat YAMAHA MT-03 2020 Owners Manual

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.
EAU16842
Engine break-in
There 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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Periodic maintenance and adjustment
6-37
6
EAU86430Engine 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 ro-
tate the cap counterclockwise to the detent to allow any residual pres-
sure to escape. When the hissing sound has stopped, press down on the
cap while turning it counterclockwise, and then remove the cap.
TIP
If coolant is not available, tap water can be temporarily used instead, provided
that it is changed to the recommended coolant as soon as possible.
Wait until the engine
has cooled.
Check the coolant
level in the reservoir
and radiator.Add coolant.
(See TIP.)
The coolant level is
OK.
There is no leakage.
There is leakage.
The coolant level is
low.
Check the cooling
system for leakage.
Have a Yamaha
dealer check and
repair the cooling
system.
Start the engine. If the engine overheats again,
have a Yamaha dealer check and repair the cooling
system.
UB6WE0E0.book Page 37 Friday, March 27, 2020 11:37 AM

10-1
10
Index
A
ABS ...................................................... 3-13
ABS warning light ................................... 3-3
Air filter element and check hose,
replacing and cleaning ....................... 6-13
B
Battery .................................................. 6-29
Brake and clutch levers,
checking and lubricating .................... 6-26
Brake and shift pedals,
checking and lubricating .................... 6-26
Brake fluid, changing ........................... 6-22
Brake fluid level, checking ................... 6-21
Brake lever ........................................... 3-12
Brake lever free play, checking ............ 6-19
Brake light switches ............................. 6-20
Brake pedal .......................................... 3-13
C
Cables, checking and lubricating ......... 6-25
Canister .................................................. 6-8
Care ........................................................ 7-1
Catalytic converter ............................... 3-17
Clock ...................................................... 3-5
Clutch lever .......................................... 3-11
Clutch lever free play, adjusting ........... 6-18
Coolant ................................................. 6-12
Coolant temperature meter .................... 3-5
D
Data recording, vehicle .......................... 9-2
Diagnostic connector ............................. 9-2
Dimmer switch ..................................... 3-10
Display units, switching.......................... 3-4
Drive chain, cleaning and lubricating ... 6-24
Drive chain slack .................................. 6-23
E
Engine break-in ...................................... 5-1
Engine oil and oil filter cartridge ............. 6-8
Engine overheating............................... 6-37
Engine serial number.............................. 9-1
Engine trouble warning light................... 3-3
F
Front and rear brake pads, checking ... 6-20
Front fork, checking ............................. 6-28
Fuel....................................................... 3-15
Fuel consumption, tips for reducing ...... 5-4
Fuel meter .............................................. 3-4
Fuel tank cap........................................ 3-14
Fuel tank overflow hose ....................... 3-16
Fuses, replacing ................................... 6-31
H
Handlebar switches .............................. 3-10
Hazard switch ....................................... 3-10
Helmet holders...................................... 3-19
High beam indicator light........................ 3-2
Horn switch........................................... 3-10
I
Identification numbers ............................ 9-1
Ignition circuit cut-off system ............... 3-22
Indicator lights and warning lights .......... 3-2
L
License plate light bulb, replacing ........ 6-33
Luggage strap holders .......................... 3-21
M
Main 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 display ............................. 3-6
Multi-function meter unit ........................ 3-4
N
Neutral indicator light.............................. 3-2
O
Oil pressure warning light ....................... 3-2
P
Parking .................................................... 5-5
Part locations .......................................... 2-1
Pass switch........................................... 3-10
S
Safety information................................... 1-1
Seats ..................................................... 3-17
Shift indicator light .................................. 3-3
Shift indicator light control mode ........... 3-8
Shifting .................................................... 5-3
Shift pedal............................................. 3-12
Shock absorber assembly, adjusting ... 3-20
Sidestand .............................................. 3-22
Sidestand, checking and lubricating .... 6-27
Spark plugs, checking ............................ 6-7
Specifications ......................................... 8-1
Speedometer .......................................... 3-4
Start/Engine stop switch ...................... 3-10
Starting the engine.................................. 5-2
Steering, checking ................................ 6-28
Storage ................................................... 7-4
Storage compartment ........................... 3-20
Supporting the motorcycle ................... 6-34
Swingarm pivots, lubricating ................ 6-27
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