2017 YAMAHA XMAX 125 check engine

Periodic maintenance and adjustment
6-35
6
EAU68020
Troubleshooting charts
Starting problems or poor engine performance
1. FuelThere is enough fuel.
There is no fuel.
Check the battery.
Supply fuel.
The engine turns over
quickly.
The engine turns over
slowly.
Operate the electric
starter.
The engine does not
start.
Check the battery.
Wipe off with a dry
cloth and correct the
spark plug gap, or
replace the spark
plug.
Check the battery
lead connections,
and have a Yamaha
dealer charge the
battery if necessary.
2. BatteryThe battery is good.
The engine does not
start.
Check the ignition.
3. IgnitionWet
Dry
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.Have a Yamaha
dealer check the
vehicle.
Remove the spark
plug and check
the electrodes.
Operate the electric
starter.
Operate the electric
starter.
Check the fuel level
in the fuel tank.
4. Compression
U2DME3E0.book Page 35 Friday, June 10, 2016 2:25 PM

Periodic maintenance and adjustment
6-36
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 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.
U2DME3E0.book Page 36 Friday, June 10, 2016 2:25 PM

Scooter care and storage
7-4
7
EAU36564
Storage
Short-term
Always store your scooter in a cool, dry
place and, if necessary, protect it
against dust with a porous cover. Be
sure the engine and the exhaust sys-
tem are cool before covering the
scooter.
NOTICE
ECA10821
Storing the scooter in a poorly
ventilated room or covering it
with a tarp, while it is still wet,
will allow water and humidity to
seep in and cause rust.
To prevent corrosion, avoid
damp cellars, stables (because
of the presence of ammonia)
and areas where strong chemi-
cals are stored.
Long-term
Before storing your scooter for several
months:
1. Follow all the instructions in the
“Care” section of this chapter.
2. Fill up the fuel tank and add fuel
stabilizer (if available) to prevent
the fuel tank from rusting and the
fuel from deteriorating.
3. Perform the following steps to
protect the cylinder, piston rings,
etc. from corrosion.
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 cylinderhead 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.)
e. Remove the spark plug cap
from the spark plug, and then
install the spark plug and the
spark plug cap. WARNING! To
prevent damage or injury
from sparking, make sure to
ground the spark plug elec-
trodes while turning the en-
gine over.
[EWA10952]
4. Lubricate all control cables and
the pivoting points of all levers and
pedals as well as of the side-
stand/centerstand.
5. Check and, if necessary, correct
the tire air pressure, and then lift
the scooter so that both of its
wheels are off the ground. Alterna-
tively, turn the wheels a little every
month in order to prevent the tires
from becoming degraded in one
spot.
6. Cover the muffler outlet with a
plastic bag to prevent moisture
from entering it.
7. Remove the battery and fully
charge it. Store it in a cool, dry
place and charge it once a month.
Do not store the battery in an ex-
cessively cold or warm place [less
than 0 °C (30 °F) or more than 30
°C (90 °F)]. For more information
on storing the battery, see page
6-27.
U2DME3E0.book Page 4 Friday, June 10, 2016 2:25 PM

Consumer information
9-2
9
EAUM3880
Diagnostic connectors
The ABS and Fuel Injection diagnostic
connectors are located as shown.
EAU74701
Vehicle data recording
This model’s ECU stores certain vehi-
cle data to assist in the diagnosis of
malfunctions and for research and de-
velopment purposes. This data will be
uploaded only when a special Yamaha
diagnostic tool is attached to the vehi-
cle, such as when maintenance checks
or service procedures are performed.
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
Yamaha will not disclose this data to a
third party except:
With the consent of the vehicle
owner
Where obligated by law
For use by Yamaha in litigation
For general Yamaha-conducted
research purposes when the data
is not related to an individual vehi-
cle nor owner
1. Fuse box
2. FI diagnostic connector
3. ABS diagnostic connector
ZAUM1433
2
3
1
U2DME3E0.book Page 2 Friday, June 10, 2016 2:25 PM

10-1
10
Index
A
ABS ...................................................... 3-15
ABS warning light ................................... 3-4
Acceleration and deceleration................ 5-3
Air filter and V-belt case air filter
elements ............................................ 6-15
Auxiliary light bulbs .............................. 6-31
B
Battery .................................................. 6-27
Brake fluid, changing ........................... 6-23
Brake fluid level, checking ................... 6-22
Brake lever, front .................................. 3-14
Brake lever, rear ................................... 3-15
Brake levers, lubricating ....................... 6-25
Braking ................................................... 5-4
C
Cables, checking and lubricating ......... 6-24
Care ........................................................ 7-1
Catalytic converters ............................. 3-18
Centerstand and sidestand, checking
and lubricating ................................... 6-25
Coolant ................................................. 6-14
D
Data recording, vehicle .......................... 9-2
Diagnostic connectors ........................... 9-2
Dimmer switch ..................................... 3-13
E
Engine break-in ...................................... 5-5
Engine oil .............................................. 6-10
Engine serial number.............................. 9-1
Engine trouble warning light................... 3-4
F
Final transmission oil ............................ 6-13
Front and rear brake lever free play,
checking............................................. 6-20
Front and rear brake pads, checking ... 6-21
Front fork, checking ............................. 6-26
Front turn signal light ........................... 6-32
Fuel....................................................... 3-17
Fuel consumption, tips for reducing ...... 5-5
Fuel level warning light ........................... 3-4
Fuel tank cap........................................ 3-16
Fuses, replacing ................................... 6-29
H
Handlebar switches.............................. 3-13
Hazard switch ...................................... 3-13
Headlight bulb, replacing ..................... 6-30
High beam indicator light ....................... 3-4
Horn switch .......................................... 3-13
I
Identification numbers ............................ 9-1
Ignition circuit cut-off system ............... 3-23
Immobilizer system ................................. 3-1
Immobilizer system indicator light .......... 3-5
Indicator lights and warning lights .......... 3-4
Info switch ............................................ 3-14
L
License plate light bulb, replacing ........ 6-33
M
Main switch/steering lock ....................... 3-2
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 ........................ 3-6
P
Panels, removing and installing .............. 6-7
Parking .................................................... 5-6
Part locations .......................................... 2-1
Pass switch........................................... 3-13
S
Safe-riding points ................................... 1-5
Safety information................................... 1-1
Seat....................................................... 3-19
Shock absorber assemblies,
adjusting ............................................. 3-21
Sidestand .............................................. 3-22
Spark plug, checking .............................. 6-9
Specifications ......................................... 8-1
Starting off .............................................. 5-3
Starting the engine.................................. 5-2
Start switch ........................................... 3-13
Steering, checking ................................ 6-26
Storage ................................................... 7-4
Storage compartments ......................... 3-20
T
Tail/brake light ...................................... 6-31
Throttle grip and cable, checking and
lubricating ........................................... 6-24
Throttle grip free play, checking ........... 6-17
Tires ...................................................... 6-18
Tool kit .................................................... 6-2
Troubleshooting .................................... 6-34
Troubleshooting charts ......................... 6-35
Turn signal indicator lights ...................... 3-4
Turn signal light bulb (rear), replacing... 6-32
Turn signal switch ................................. 3-13
U2DME3E0.book Page 1 Friday, June 10, 2016 2:25 PM