2016 YAMAHA XENTER 125 engine

Operation and important riding points
5-3
1
2
3
45
6
7
8
9
10
11
12
EAU16794
Braking
WARNING
EWA10301

Avoid braking hard or suddenly
(especially when leaning over to
one side), otherwise the scooter
may skid or overturn.

Railroad crossings, streetcar
rails, iron plates on road con-
struction sites, and manhole
covers become extremely slip-
pery when wet. Therefore, slow
down when approaching such
areas and cross them with cau-
tion.

Keep in mind that braking on a
wet road is much more difficult.

Ride slowly down a hill, as brak-
ing downhill can be very diffi-cult.
1. Close the throttle completely.
2. Apply both front and rear brakes simultaneously while gradually in-
creasing the pressure.
EAU16821
Tips for reducing fuel
consumptionFuel consumption depends largely on
your riding style. Consider the following
tips to reduce fuel consumption:
Avoid high engine speeds during
acceleration.

Avoid high engine speeds with no
load on the engine.

Turn the engine off instead of let-
ting it idle for an extended length of
time (e.g., in traffic jams, at traffic
lights or at railroad crossings).
EAU16831
Engine break-inThere is never a more important period
in the life of your engine than the period
between 0 and 1000 km (600 mi). For
this reason, you should read the follow-
ing material carefully.
Since the engine is brand new, do not
put an excessive load on it for the first
1000 km (600 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.
EAUT3541
0–150 km (0–90 mi)
Avoid prolonged operation above 1/3
throttle.
After every hour of operation, stop the
engine, and then let it cool for five to ten
minutes.
Vary the engine speed from time to
time. Do not operate the engine at one
set throttle position.
U53BE1E0 3 ページ ２０１５年９月１５日　火曜日　午後１時４８分

Operation and important riding points
5-4
1
2
3
456
7
8
9
10
11
12
150–500 km (90–300 mi)
Avoid prolonged operation above 1/2
throttle.
500–1000 km (300–600 mi)
Avoid prolonged operation above 3/4
throttle.
NOTICE: After 1000 km (600
mi) of operation, be sure to change
the engine oil and final transmission
oil, and to clean the oil strain-
er.
[ECA16502]
1000 km (600 mi) and beyond
Avoid prolonged full-throttle operation.
Vary the engine speed occasionally.NOTICE
ECA10271
If any engine trouble should occur
during the engine break-in period,
immediately have a Yamaha dealercheck the vehicle.
EAU17214
ParkingWhen parking, stop the engine, and
then remove the key from the main
switch.
WARNING
EWA10312

Since the engine and exhaust
system can become very hot,
park in a place where pedestri-
ans or children are not likely to
touch them and be burned.

Do not park on a slope or on soft
ground, otherwise the vehicle
may overturn, increasing the
risk of a fuel leak and fire.

Do not park near grass or other
flammable materials whichmight catch fire.
U53BE1E0 4 ページ ２０１５年９月１５日　火曜日　午後１時４８分

6-1
1
2
3
4
56
7
8
9
10
11
12
Periodic maintenance and adjustment
EAUS1824
Periodic inspection, adjustment, and lu-
brication will keep your vehicle in the
safest and most efficient condition pos-
sible. Safety is an obligation of the vehi-
cle owner/operator. The most important
points of vehicle inspection, adjust-
ment, and lubrication are explained on
the following pages.
The intervals given in the periodic
maintenance charts should be simply
considered as a general guide under
normal riding conditions. However, de-
pending on the weather, terrain, geo-
graphical location, and individual use,
the maintenance intervals may need to
be shortened.
WARNING
EWA10322
Failure to properly maintain the ve-
hicle or performing maintenance ac-
tivities incorrectly may increase
your risk of injury or death during
service or while using the vehicle. If
you are not familiar with vehicle ser-
vice, have a Yamaha dealer performservice.
WARNING
EWA15123
Turn off the engine when performing
maintenance unless otherwise
specified.
A running engine has moving
parts that can catch on body
parts or clothing and electrical
parts that can cause shocks or
fires.

Running the engine while ser-
vicing can lead to eye injury,
burns, fire, or carbon monoxide
poisoning – possibly leading to
death. See page 1-2 for more in-
formation about carbon monox-ide.WARNING
EWA10331
This scooter is designed for use on
paved roads only. If this scooter is
operated in abnormally dusty, mud-
dy or wet conditions, the air filter el-
ement should be cleaned or
replaced more frequently, otherwise
rapid engine wear may result. Con-
sult a Yamaha dealer for propermaintenance intervals.
WARNING
EWA15461
Brake discs, calipers, drums, and
linings can become very hot during
use. To avoid possible burns, let
brake components cool beforetouching them.
U53BE1E0 1 ページ ２０１５年９月１５日　火曜日　午後１時４８分

Periodic maintenance and adjustment
6-4
1
2
3
4
567
8
9
10
11
12
EAU46921
Periodic maintenance chart fo r the emission control systemNO. ITEM CHECK OR MAINTENANCE JOB ODOMETER READING
ANNUAL
CHECK
1000 km
(600 mi) 6000 km
(3500 mi) 12000 km
(7000 mi) 18000 km
(10500 mi) 24000 km
(14000 mi)
1 * Fuel line Check fuel hoses for cracks or
damage. 
2 Spark plug Check condition.
Clean and regap.

Replace. 
3 * Valves Check valve clearance.
Adjust. 
4 * Fuel injection Check engine idle speed. 
5 * Exhaust system Check for leakage.
Tighten if necessary.
Replace gasket(s) if necessary. 
U53BE1E0 4 ページ ２０１５年９月１５日　火曜日　午後１時４８分

Periodic maintenance and adjustment
6-6
1
2
3
4
567
8
9
10
11
12
12 *Front brake lever
pivot shaft Lubricate with lithium-soap-based
grease. 
13 *Rear brake lever
pivoting points Lubricate with silicone grease.

14 Centerstand Check operation.
Lubricate. 
15 *Front fork Check operation and for oil
leakage. 
16 *Shock absorber
assembly Check operation and shock
absorber for oil leakage. 
17 Engine oil Change. (See page 3-2.)
When the oil change indicator comes on [5000 km (3000 mi) after
the initial 1000 km (600 mi) and every 6000 km (3500 mi) thereafter]
Check oil level and vehicle for oil leakage. Every 3000 km (1800 mi)

18 Engine oil strainer Clean. 5000 km (3000 mi) after the initial 1000 km (600 mi) and every
6000 km (3500 mi) thereafter
19 * Cooling system Check coolant level and vehicle
for coolant leakage. 
Change coolant. Every 3 years
20 Final transmission
oil Check vehicle for oil leakage.
 
Change. 
21 *V-belt Replace. When the V-belt replacement indicator comes on
22 *Front and rear brake
switches Check operation.

23 Moving parts and
cables Lubricate.

NO. ITEM CHECK OR MAINTENANCE JOB
ODOMETER READING
ANNUAL
CHECK
1000 km
(600 mi) 6000 km
(3500 mi) 12000 km
(7000 mi) 18000 km
(10500 mi) 24000 km
(14000 mi)
U53BE1E0 6 ページ ２０１５年９月１５日　火曜日　午後１時４８分

Periodic maintenance and adjustment6-10
1
2
3
4
567
8
9
10
11
12
To install the panel
1. Insert the projections on the panel
into the slots as shown, and then
install the screws.
2. Close the seat.
EAUT1837
Checking the spark plugThe spark plug is an important engine
component, which is easy to check.
Since heat and deposits will cause any
spark plug to slowly erode, the spark
plug should be removed and checked
in accordance with the periodic mainte-
nance and lubrication chart. In addition,
the condition of the spark plug can re-
veal the condition of the engine.
To remove the spark plug 1. Place the vehicle on the center- stand.
2. Remove panel C. (See page 6-8.)
3. Remove the spark plug cap.
4. Remove the spark plug as shown, with the spark plug wrench includ-
ed in the owner’s tool kit. To check the spark plug
1. Check that the porcelain insulator around the center electrode of the
spark plug is a medium-to-light tan
(the ideal color when the vehicle is
ridden normally).
TIPIf the spark plug shows a distinctly dif-
ferent color, the engine could be oper-
ating improperly. Do not attempt to
diagnose such problems yourself. In-
stead, have a Yamaha dealer checkthe vehicle.
2. Check the spark plug for electrode erosion and excessive carbon or
other deposits, and replace it if
1. Projection
1
1. Spark plug wrench
1
U53BE1E0 10 ページ ２０１５年９月１５日　火曜日　午後１時４８分

Periodic maintenance and adjustment
6-11
1
2
3
4
56
7
8
9
10
11
12 necessary.
3. Measure the spark plug gap with a wire thickness gauge and, if nec-
essary, adjust the gap to specifica-
tion.
To install the spark plug 1. Clean the surface of the spark plug gasket and its mating surface, and
then wipe off any grime from the
spark plug threads.
2. Install the spark plug with the spark plug wrench, and then tight-
en it to the specified torque.
TIPIf a torque wrench is not available when
installing a spark plug, a good estimate
of the correct torque is 1/4–1/2 turn past finger tight. However, the spark
plug should be tightened to the speci-
fied torque as soon as possible.
3. Install the spark plug cap.
4. Install the panel.
EAUT3703
Engine oil and oil strainerThe engine oil level should be checked
before each ride. In addition, the oil
must be changed and the oil strainer
cleaned at the intervals specified in the
periodic maintenance and lubrication
chart.
To check the engine oil level
1. Place the scooter on the center- stand. A slight tilt to the side can
result in a false reading.
2. Start the engine, warm it up for several minutes, and then turn it
off.
3. Wait a few minutes until the oil set- tles, remove the oil filler cap, wipe
the dipstick clean, insert it back
into the oil filler hole (without
screwing it in), and then remove it
again to check the oil level.TIPThe engine oil should be between theminimum and maximum level marks.
Specified spark plug:NGK / CPR9EA-9
Spark plug gap: 0.8–0.9 mm (0.031–0.035 in)
Tightening torque: Spark plug: 13 Nm (1.3 m·kgf, 9.4 ft·lbf)
U53BE1E0 11 ページ ２０１５年９月１５日　火曜日　午後１時４８分

Periodic maintenance and adjustment6-12
1
2
3
4
567
8
9
10
11
12
4. If the engine oil is below the mini-
mum level mark, add sufficient oil
of the recommended type to raise
it to the correct level.
5. Insert the dipstick into the oil filler hole, and then tighten the oil filler
cap.
To change the engine oil and clean
the oil strainer 1. Start the engine, warm it up for several minutes, and then turn it
off.
2. Place an oil pan under the engine to collect the used oil. 3. Remove the engine oil filler cap
and the engine oil drain bolts A
and B to drain the oil from the
crankcase. NOTICE: When re-
moving the engine oil drain bolt
B, the O-ring, compression
spring, and oil strainer will fall
out. Take care not to lose these
parts.
[ECAT1022]
4. Clean the oil strainer with solvent, and then check it for damage and
replace it if necessary.
5. Check the O-ring for damage and replace it if necessary.
6. Install the oil strainer, compression
1. Oil filler cap
2. Maximum level mark
3. Minimum level mark
23 1
1. Oil filler cap
1
1. Engine oil drain bolt A
1. Engine oil drain bolt B
1
1
U53BE1E0 12 ページ ２０１５年９月１５日　火曜日　午後１時４８分