2019 YAMAHA XMAX 125 maintenance

Periodic maintenance an d a djustment
8-33
8
EAU86420
En gine overheatin g
WARNING
EWAT1041
Do not remove the ra diator cap when the en gine an d ra diator are hot. Scal din g hot flui d an d steam may be
b lown out un der pressure, which coul d cause serious injury. Be sure to wait until the en gine has coole d.
 Place a thick ra g, like a towel, over the ra diator cap, an d then slowly rotate the cap counterclockwise to the
d etent to allow any resi dual pressure to escape. When the hissin g soun d has stoppe d, press down on the cap
while turnin g it counterclockwise, an d 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.
UB9YE0E0.book Page 33 Wednesday, January 6, 2021 3:03 PM

Periodic maintenance an d a djustment
8-34
8
EAU76561
Emer gency mo de When the smart key is lost or dam-
aged, or its battery has discharged, the
vehicle can still be turned on and the
engine started. You will need the smart
key system identification number.
To operate the vehicle in emer gency
mo de
1. Stop the vehicle in a safe place and turn the main switch to “OFF”.
2. Push the main switch knob for 5 seconds until the smart key sys-
tem indicator light flashes once,
then release it. Repeat two more
times. The smart key system indi-
cator light will come on for three
seconds to indicate the transition
to emergency mode. 3. After the smart key system indica-
tor light goes off, input the identifi-
cation number as follows. 4. Inputting the identification number
is done by counting the number of
flashes of the smart key system in-
dicator light.
For example, if the identification
number is 123456:
Push and hold the knob.
↓
The smart key system indicator
light will start to flash.
↓
Release the knob after the smart
key system indicator light flashes
once.
↓
The first digit of the identification
number has been set as “1”.
↓
Push and hold the knob again.
↓
1. Smart key system indicator light “ ”
1. Identification number card
2. Identification numberZAUM1884
1
868588
1
2
UB9YE0E0.book Page 34 Wednesday, January 6, 2021 3:03 PM

Periodic maintenance an d a djustment
8-35
8
Release the knob after the smart
key system indicator light flashes
twice.
↓
The second digit has been set as
“2”.
↓
Repeat the above procedure until
all digits of the identification num-
ber have been set. The smart key
system indicator light will flash for
10 seconds if the correct identifi-
cation number was entered.
TIPWhen one of the following situations
applies, emergency mode will be ter-
minated and the smart key system in-
dicator light will flash quickly for 3
seconds. In this case, start over again
from step 2. 
When there are no knob opera-
tions for 10 seconds during the
identification number input pro-
cess.
 When the smart key system indi-
cator light is allowed to flash nine
or more times.
 The identification number is not
entered correctly.
5. While the smart key system indi-
cator light is on, push the knob
once more to complete emergen-
cy mode access. The smart key
indicator light will go off and then
come back on for approximately 4
seconds.
6. While the smart key system indi- cator light is on, turn the main
switch to “ON”. The vehicle can
now be operated normally.
UB9YE0E0.book Page 35 Wednesday, January 6, 2021 3:03 PM

Scooter care and stora ge
9-4
9
1. Make all necessary repairs and
perform any outstanding mainte-
nance.
2. Follow all instructions in the Care section of this chapter.
3. Fill up the fuel tank, adding fuel stabilizer according to product in-
structions. Run the engine for 5
minutes to distribute treated fuel
through the fuel system.
4. For vehicles equipped with a fuel cock: Turn the fuel cock lever to
the off position.
5. For vehicles with a carburetor: To prevent fuel deposits from build-
ing up, drain the fuel in the carbu-
retor float chamber into a clean
container. Retighten the drain bolt
and pour the fuel back into the fuel
tank.
6. Use a quality engine fogging oil according to product instructions
to protect internal engine compo-
nents from corrosion. If engine
fogging oil is not available, per-
form the following steps for each
cylinder:a. Remove the spark plug cap and spark plug. b. Pour a teaspoonful of engine
oil into the spark plug bore.
c. Install the spark plug cap onto the spark plug, and then place
the spark plug on the cylinder
head so that the electrodes are
grounded. (This will limit spark-
ing during the next step.)
d. Turn the engine over several times with the starter. (This will
coat the cylinder wall with oil.)
WARNING! To prevent dam-
a g e or injury from sparkin g,
make sure to groun d the
spark plu g electro des while
turnin g the en gine over.
[EWA10952]
e. Remove the spark plug cap
from the spark plug, and then
install the spark plug and the
spark plug cap.
7. Lubricate all control cables, piv- ots, levers and pedals, as well as
the sidestand and centerstand (if
equipped).
8. Check and correct the tire air pressure, and then lift the vehicle
so that all wheels are off the
ground. Otherwise, turn the wheels a little once a month in or-
der to prevent the tires from be-
coming degraded in one spot.
9. Cover the muffler outlet with a plastic bag to prevent moisture
from entering it.
10. Remove the battery and fully char- ge it, or attach a maintenance
charger to keep the battery opti-
mally charged. NOTICE: Confirm
that the battery an d its char ger
are compati ble. Do not char ge a
VRLA battery with a convention-
al char ger.
[ECA26330]
TIP If the battery will be removed,
charge it once a month and store
it in a temperate location between
0-30 °C (32-90 °F).
 See page 8-26 for more informa-
tion on charging and storing the
battery.
UB9YE0E0.book Page 4 Wednesday, January 6, 2021 3:03 PM

Consumer information
11-2
11
The model label is affixed to the inside
of the rear storage compartment. (See
page 5-20.) Record the information on
this label in the space provided. This
information will be needed when order-
ing spare parts from a Yamaha dealer.
EAU69910
Dia
gnostic connectorThe diagnostic connector is located as
shown.
EAU85300
Vehicle data recor din gThis model’s ECU stores certain vehi-
cle data to assist in the diagnosis of
malfunctions and for research, statisti-
cal analysis and development purpos-
es.
Although the sensors and recorded
data will vary by model, the main data
points are:
 Vehicle status and engine perfor-
mance data
 Fuel-injection and emission-relat-
ed data
This data will be uploaded only when a
special Yamaha diagnostic tool is at-
tached to the vehicle, such as when
maintenance checks or service proce-
dures are performed.
Vehicle data uploaded will be handled
appropriately according to the follow-
ing Privacy Policy.
Privacy Policy
1. Diagnostic connectorZAUM1976
1 1
1
https://www.yamaha-motor.eu/eu/
privacy/privacy-policy.aspx
UB9YE0E0.book Page 2 Wednesday, January 6, 2021 3:03 PM

12-1
12
Index
AABS warning light ................................... 5-2
Acceleration and deceleration ................ 7-3
Activating the Stop and Start System .... 4-1
Air filter and V-belt case air filter
elements ............................................. 8-14
Anti-lock brake system (ABS)............... 5-14
Auxiliary DC jack .................................. 5-26BBattery .................................................. 8-26
Brake fluid, changing............................ 8-22
Brake fluid level, checking.................... 8-21
Brake lever, front .................................. 5-14
Brake lever, rear ................................... 5-14
Brake levers, lubricating ....................... 8-23
Braking ................................................... 7-3CCables, checking and lubricating ......... 8-23
Canister ................................................ 8-10
Care ........................................................ 9-1
Catalytic converter ............................... 5-20
Centerstand and sidestand, checking and lubricating ................................... 8-24
Coolant ................................................. 8-13DData recording, vehicle......................... 11-2
Diagnostic connector ........................... 11-2
Dimmer/Pass switch............................. 5-12EEmergency mode ................................. 8-34
Engine break-in ...................................... 7-1
Engine oil and oil strainer ..................... 8-10
Engine overheating ............................... 8-33
Engine serial number ............................ 11-1
FFinal transmission oil............................ 8-12
Front and rear brake lever free play, checking ............................................ 8-19
Front and rear brake pads, checking ... 8-20
Front fork, checking ............................. 8-25
Front turn signal light ........................... 8-29
Fuel ...................................................... 5-18
Fuel consumption, tips for reducing ...... 7-4
Fuel tank cap........................................ 5-17
Fuel tank overflow hose ....................... 5-20
Fuses, replacing ................................... 8-27HHandlebar position, adjusting .............. 5-25
Handlebar switches ............................. 5-12
Hazard switch ...................................... 5-13
High beam indicator light ....................... 5-1
Horn switch .......................................... 5-13IIdentification numbers ......................... 11-1
Ignition circuit cut-off system .............. 5-27
Indicator lights and warning lights ......... 5-1KKey, handling of smart and mechanical keys...................................................... 3-3LLicense plate light bulb, replacing ....... 8-30MMain switch ............................................ 3-8
Maintenance and lubrication, periodic... 8-4
Maintenance, emission control system ................................................. 8-3
Malfunction indicator light (MIL)............. 5-1
Matte color, caution ............................... 9-1 Model label ........................................... 11-1
Multi-function display ............................. 5-4
OOperating range of the smart key
system .................................................. 3-2PPanel, removing and installing ................ 8-8
Parking.................................................... 7-4
Part locations.......................................... 2-1
Precautions when using the Stop and Start System ......................................... 4-3SSafe-riding points ................................... 1-5
Safety information................................... 1-1
Shock absorber assemblies, adjusting ............................................. 5-25
Sidestand.............................................. 5-27
Smart key................................................ 3-5
Smart key battery, replacing................... 3-6
Smart key system ................................... 3-1
Smart key system indicator light ............ 5-2
Smart key system, troubleshooting ...... 8-31
Spark plug, checking .............................. 8-9
Specifications ....................................... 10-1
Speedometer .......................................... 5-3
Starting off .............................................. 7-3
Starting the engine ................................. 7-2
Steering, checking ................................ 8-25
Stop and Start System ........................... 4-1
Stop and Start System indicator light..... 5-2
Stop and Start System operation ........... 4-1
Stop and Start System switch .............. 5-13
Stop/Run/Start switch .......................... 5-13
Storage ................................................... 9-3
UB9YE0E0.book Page 1 Wednesday, January 6, 2021 3:03 PM