PERIODIC MAINTENANCE AND ADJUSTMENT
6-15
66. Install the final transmission oil
drain bolt and its new gasket, and
then tighten the bolt to the speci-
fied torque.
7. Refill with the specified amount of
the recommended final transmis-
sion oil. WARNING! Make sure
that no foreign material enters
the final transmission case.
Make sure that no oil gets on
the tire or wheel.
[EWA11312]
8. Install the final transmission oil fill-
er cap and its new O-ring, and
then tighten the oil filler cap.
9. Check the final transmission case
for oil leakage. If oil is leaking,
check for the cause.
EAU20071
CoolantThe coolant level should be checked
before each ride. In addition, the cool-
ant must be changed at the intervals
specified in the periodic maintenance
and lubrication chart.
EAUM3043
To check the coolant level
1. Place the vehicle on a level sur-
face and hold it in an upright posi-
tion.
2. Open the front storage compart-
ment A. (See page 3-20.)TIPThe coolant level must be
checked on a cold engine since
the level varies with engine tem-
perature.
Make sure that the vehicle is posi-
tioned straight up when checking
the coolant level. A slight tilt to the
side can result in a false reading.3. Check the coolant level through
the check window.
TIPThe coolant should be between the
minimum and maximum level marks.4. If the coolant is at or below the
minimum level mark, remove pan-
el A. (See page 6-8.)
5. Open the reservoir cap, and then
add coolant to the maximum level
mark. WARNING! Remove only
the coolant reservoir cap. Never
attempt to remove the radiator
cap when the engine is hot.
[EWA15162]
NOTICE: If coolant is not
available, use distilled water or
soft tap water instead. Do not
use hard water or salt water
Tightening torque:
Final transmission oil drain bolt:
20 Nm (2.0 m·kgf, 14 ft·lbf)
Recommended final transmission
oil:
See page 8-1.
Oil quantity:
0.21 L (0.22 US qt, 0.18 Imp.qt)
1. Maximum level mark
2. Minimum level markZAUM1029
2 1
Coolant LevelCoolant L
evelH
ighH
igh
LowLo
w
U2DME1E0.book Page 15 Wednesday, October 23, 2013 1:37 PM
PERIODIC MAINTENANCE AND ADJUSTMENT
6-16
6 since it is harmful to the engine.
If water has been used instead
of coolant, replace it with cool-
ant as soon as possible, other-
wise the cooling system will not
be protected against frost and
corrosion. If water has been
added to the coolant, have a
Yamaha dealer check the anti-
freeze content of the coolant as
soon as possible, otherwise the
effectiveness of the coolant will
be reduced.
[ECA10473]
6. Close the reservoir cap, and then
install the panel.7. Close the front storage compart-
ment.
EAU33032
Changing the coolant
The coolant must be changed at the in-
tervals specified in the periodic main-
tenance and lubrication chart. Have a
Yamaha dealer change the coolant.
WARNING! Never attempt to remove
the radiator cap when the engine is
hot.
[EWA10382]EAUM3370
Air filter and V-belt case air fil-
ter elements and check hosesThe air filter element should be re-
placed and the V-belt case air filter el-
ement should be cleaned at the
intervals specified in the periodic main-
tenance and lubrication chart. Service
the air filter elements more frequently if
you are riding in unusually wet or dusty
areas.
Replacing the air filter element
1. Place the scooter on the center-
stand.
2. Remove the air filter case cover by
removing the screws.
1. Coolant reservoir capCoolant reservoir capacity:
0.32 L (0.34 US qt, 0.28 Imp.qt)ZAUM10301
1. Air filter case cover
2. Screw
3. Air filter elementZAUM11241
22
3
U2DME1E0.book Page 16 Wednesday, October 23, 2013 1:37 PM
PERIODIC MAINTENANCE AND ADJUSTMENT
6-29
6
EAUM3092
Replacing the fusesThe fuse box, which contains the fuses
for the individual circuits, is located be-
hind panel B. (See page 6-8.)TIPThe main fuse, which is in a different
and hard-to-reach location, must be
replaced by a Yamaha dealer.If a fuse for the individual circuits is
blown, replace it as follows.
1.
the electrical circuit in question.
2. Remove the blown fuse, and then
install a new fuse of the specified
amperage. WARNING! Do notuse a fuse of a higher amperage
rating than recommended to
avoid causing extensive dam-
age to the electrical system and
possibly a fire.
[EWA15132]
TIP
tool kit. Use the tongs to remove and
install a fuse.
YP125R
1. Main fuse
2. Spare main fuseZAUM1058
11
2
1. Fuse boxZAUM1036
1
1. Radiator fan fuse
2. ECU fuse
3. Backup fuse
4. Signaling system fuse
5. Headlight fuse
6. Ignition fuse
7. Spare fuse
8. Hazard fuseZAUM1037
7
1
2
3
4
5
620 10
1020
1010 1010
7.57.5
U2DME1E0.book Page 29 Wednesday, October 23, 2013 1:37 PM
PERIODIC MAINTENANCE AND ADJUSTMENT
6-30
6 YP125RA
3. Turn the key to “ON” and turn on
the electrical circuit in question to
check if the device operates.
4. If the fuse immediately blows
again, have a Yamaha dealer
check the electrical system.
EAU34242
Replacing a headlight bulbThis model is equipped with halogen
bulb headlights. If a headlight bulb
burns out, have a Yamaha dealer re-
place it and, if necessary, adjust the
headlight beam.
1. Radiator fan fuse
2. ECU fuse
3. Backup fuse
4. Signaling system fuse
5. Headlight fuse
6. Ignition fuse
7. Spare fuse
8. Hazard fuse
9. ABS control unit fuse
10.ABS motor fuse
11.ABS solenoid fuseZAUM1129
10
10
10
20
30
30
7
7
11
1
2
3
4
56
20 1020
1010 1010
7.57.5
9
10
Specified fuses:
Main fuse:
30.0 A
Ignition fuse:
10.0 A
Signaling system fuse:
10.0 A
Headlight fuse:
20.0 A
Turn signal light and hazard fuse:
10.0 A
Radiator fan fuse:
7.5 A
ABS control unit fuse:
YP125RA 10.0 A
ABS motor fuse:
YP125RA 30.0 A
ABS solenoid fuse:
YP125RA 20.0 A
Backup fuse:
10.0 A
U2DME1E0.book Page 30 Wednesday, October 23, 2013 1:37 PM
PERIODIC MAINTENANCE AND ADJUSTMENT
6-35
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 rotate the cap counterclockwise to the
detent to allow any residual pressure to escape. When the hissing sound has stopped, press down on the cap
while 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 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.
U2DME1E0.book Page 35 Wednesday, October 23, 2013 1:37 PM
SPECIFICATIONS
8-1
8
Dimensions:Overall length:
2160 mm (85.0 in)
Overall width:
790 mm (31.1 in)
Overall height:
1385 mm (54.5 in)
Seat height:
785 mm (30.9 in)
Wheelbase:
1525 mm (60.0 in)
Ground clearance:
125 mm (4.92 in)
Minimum turning radius:
2500 mm (98.4 in)Weight:Curb weight:
YP125R 169 kg (373 lb)
YP125RA 173 kg (381 lb)Engine:Engine type:
Liquid cooled 4-stroke, SOHC
Cylinder arrangement:
Single cylinder
Displacement:
124 cm³
Bore × stroke:
52.0 × 58.6 mm (2.05 × 2.31 in)
Compression ratio:
11.20 : 1
Starting system:
Electric starter
Lubrication system:
Wet sump
Engine oil:Recommended brand:
YAMALUBE
Type:
SAE 10W-30, 10W-40, 15W-40, 20W-40 or
20W-50
Recommended engine oil grade:
API service SG type or higher, JASO
standard MA
Engine oil quantity:
Without oil filter element replacement:
1.40 L (1.48 US qt, 1.23 Imp.qt)
With oil filter element replacement:
1.50 L (1.59 US qt, 1.32 Imp.qt)Final transmission oil:Type:
YAMALUBE 10W-40 or SAE 10W-30 type
SE motor oil
Quantity:
0.21 L (0.22 US qt, 0.18 Imp.qt)
Cooling system:Coolant reservoir capacity (up to the
maximum level mark):
0.32 L (0.34 US qt, 0.28 Imp.qt)
Radiator capacity (including all routes):
1.10 L (1.16 US qt, 0.97 Imp.qt)Air filter:Air filter element:
Oil-coated paper elementFuel:Recommended fuel:
Premium unleaded gasoline (Gasohol (E10)
acceptable)
Fuel tank capacity:
13.2 L (3.49 US gal, 2.90 Imp.gal)
Fuel reserve amount:
2.5 L (0.66 US gal, 0.55 Imp.gal)Fuel injection:Throttle body:
ID mark:
1B91 00Spark plug(s):Manufacturer/model:
NGK/CPR9EA-9
Spark plug gap:
0.8–0.9 mm (0.031–0.035 in)Clutch:Clutch type:
Dry, centrifugal automaticTransmission:Primary reduction ratio:
(1.000)
Final drive:
Gear
–20 –10 0
1020 30 40 50 C 10 30 50 70 90 110 0 130 F
SAE 10W-30
SAE 15W-40SAE 20W-40SAE 20W-50
SAE 10W-40SAE 10W-50
U2DME1E0.book Page 1 Wednesday, October 23, 2013 1:37 PM
SPECIFICATIONS
8-3
8
Voltage, capacity:
12 V, 8.0 AhHeadlight:Bulb type:
Halogen bulbBulb voltage, wattage × quantity:Headlight:
12 V, 55.0 W × 2
Tail/brake light:
LED
Front turn signal light:
12 V, 10.0 W × 2
Rear turn signal light:
12 V, 10.0 W × 2
Auxiliary light:
12 V, 5.0 W × 2
License plate light:
12 V, 5.0 W × 1
Meter lighting:
LED
High beam indicator light:
LED
Turn signal indicator light:
LED
Fuel level warning light:
LED
Engine trouble warning light:
LED
ABS warning light:
YP125RA LED
Immobilizer system indicator light:
LED
Fuses:Main fuse:
30.0 A
Headlight fuse:
20.0 A
Signaling system fuse:
10.0 A
Ignition fuse:
10.0 A
Radiator fan fuse:
7.5 A
Turn signal light and hazard fuse:
10.0 A
ECU fuse:
10.0 A
ABS control unit fuse:
YP125RA 10.0 A
ABS motor fuse:
YP125RA 30.0 A
ABS solenoid fuse:
YP125RA 20.0 A
Backup fuse:
10.0 A
U2DME1E0.book Page 3 Wednesday, October 23, 2013 1:37 PM