check engine YAMAHA XENTER 125 2016 Owner's Manual

Periodic maintenance and adjustment6-18
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EAU21402
Valve clearanceThe valve clearance changes with use,
resulting in improper air-fuel mixture
and/or engine noise. To prevent this
from occurring, the valve clearance
must be adjusted by a Yamaha dealer
at the intervals specified in the periodic
maintenance and lubrication chart.
EAU61710
TiresTires are the only contact between the
vehicle and the road. Safety in all con-
ditions of riding depends on a relatively
small area of road contact. Therefore, it
is essential to maintain the tires in good
condition at all times and replace them
at the appropriate time with the speci-
fied tires.
Tire air pressure
The tire air pressure should be checked
and, if necessary, adjusted before each
ride.
WARNING
EWA10504
Operation of this vehicle with im-
proper tire pressure may cause se-
vere injury or death from loss of
control.
The tire air pressure must be
checked and adjusted on cold
tires (i.e., when the temperature
of the tires equals the ambient
temperature).

The tire air pressure must be ad-
justed in accordance with the
riding speed and with the total weight of rider, passenger, car-
go, and accessories approved
for this model.WARNING
EWA10512
Never overload your vehicle. Opera-
tion of an overloaded vehicle couldcause an accident.
Tire air pressure (measured on cold
tires):
Up to 90 kg (198 lb) load: Front:175 kPa (1.75 kgf/cm
2, 25 psi)
Rear: 200 kPa (2.00 kgf/cm2, 29 psi)
90 kg (198 lb) to maximum load:
Front:175 kPa (1.75 kgf/cm2, 25 psi)
Rear:
225 kPa (2.25 kgf/cm2, 33 psi)
Maximum load*: 179 kg (395 lb)
* Total weight of rider, passenger, car- go and accessories
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Periodic maintenance and adjustment
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EAU42706
Troubleshooting chartsStarting problems or poor engine performanceCheck the fuel level in
the fuel tank.1. Fuel
There is enough fuel.
There is no fuel.
Check the battery.
Supply fuel.
The engine does not start.
Check the battery.
Operate the electric starter.4. Compression
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.
Remove the spark plug
and check the electrodes.3. Ignition
Wipe off with a dry cloth and correct the
spark plug gap, or replace the spark plug. Have a Yamaha dealer check the vehicle.
The engine does not start.
Check the compression.
Operate the electric starter.2. Battery
The engine turns over
quickly.
The engine turns over
slowly.
The battery is good.
DryWet
Operate the electric starter.
Check the battery lead connections,
and have a Yamaha dealer charge
the battery if necessary.
The engine does not start.
Check the ignition.
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Periodic maintenance and adjustment6-34
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Engine 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 rotate the cap counterclockwise to the de-
tent to allow any residual pressure to escape. When the hissing sound has stopped, press down on the capwhile turning it counterclockwise, and then remove the cap.
TIPIf coolant is not available, tap water can be temporarily
used instead, provided that it is changed to the recommended coolantas 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.
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Scooter care and storage
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EAU36564
StorageShort-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 scoot-
er.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 pro- tect 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 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.)
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 sidestand/
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
6-26.TIPMake any necessary repairs beforestoring the scooter.
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Index
AAcceleration and deceleration ................... 5-2
Air filter and V-belt case air filter
elements ................................................ 6-16
Auxiliary light bulb, replacing ................... 6-29BBattery ..................................................... 6-26
Brake fluid, changing ............................... 6-23
Brake fluid level, checking ....................... 6-22
Brake lever, front ....................................... 3-7
Brake lever, rear ........................................ 3-8
Brake levers, lubricating .......................... 6-24
Brake pads and shoes, checking............. 6-21
Braking ...................................................... 5-3CCables, checking and lubricating ............. 6-23
Care ........................................................... 7-1
Carrier...................................................... 3-14
Catalytic converter ................................... 3-10
Centerstand, checking and lubricating .... 6-24
Coolant .................................................... 6-14
Coolant temperature warning light............. 3-2
Cowling and panels, removing and installing .................................................. 6-8DDimmer switch ........................................... 3-7EEngine break-in ......................................... 5-3
Engine idling speed, checking ................. 6-17
Engine oil ................................................. 6-11
Engine serial number................................. 9-1
Engine trouble warning light ...................... 3-3FFinal transmission oil ............................... 6-13 Front brake lever free play, checking ...... 6-20
Front fork, checking................................. 6-25
Fuel ........................................................... 3-9
Fuel consumption, tips for reducing .......... 5-3
Fuel tank cap............................................. 3-8
Fuses, replacing ...................................... 6-28
HHandlebar switches ................................... 3-7
Headlight bulb, replacing......................... 6-28
High beam indicator light........................... 3-2
Horn switch ............................................... 3-7IIdentification numbers ............................... 9-1
Indicator lights and warning lights ............. 3-2LLicense plate light ................................... 6-32
Luggage holder ....................................... 3-14MMain switch/steering lock .......................... 3-1
Maintenance and lubricatio
n, periodic....... 6-5
Maintenance, emission control system ..... 6-4
Matte color, caution ................................... 7-1
Model label ................................................ 9-2
Multi-function display................................. 3-3PParking ...................................................... 5-4
Part locations ............................................ 2-1
Passenger footrest .................................. 3-11RRear brake lever free play, adjusting ...... 6-20SSafe-riding points ...................................... 1-5
Safety information ..................................... 1-1
Seat ......................................................... 3-11 Shock absorber assembly .......................3-13
Spark plug, checking ...............................6-10
Specifications.............................................8-1
Starting off .................................................5-2
Starting the engine.....................................5-1
Start switch ................................................3-7
Steering, checking ...................................6-26
Storage ......................................................7-4
Storage compartments ............................3-12
TTail/brake light ......................................... 6-30
Throttle grip and cable, checking and
lubricating ..............................................6-24
Throttle grip free play, checking...............6-17
Tires .........................................................6-18
Tool kit .......................................................6-2
Troubleshooting .......................................6-32
Troubleshooting charts ............................6-33
Turn signal indicator lights .........................3-2
Turn signal light bulb (front), replacing ....6-30
Turn signal light bulb (r ear), replacing .....6-31
Turn signal switch ......................................3-7VValve clearance .......................................6-18
Vehicle identificat ion number .....................9-1WWheel bearings, checking........................6-26
Wheels .....................................................6-20
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