fuel YAMAHA YBR125 2014 User Guide

OPERATION AND IMPORTANT RIDING POINTS
5-4
5
EAU17214
ParkingWhen parking, stop the engine, and
then remove the key from the main
switch.
WARNING
EWA10312
Since the en gine an d exhaust
system can b ecome very hot,
park in a place where pe destri-
ans or chil dren are not likely to
touch them an d b e burne d.
 Do not park on a slope or on soft
groun d, otherwise the vehicle
may overturn, increasin g the
risk of a fuel leak an d fire.
 Do not park near grass or other
flamma ble materials which
mi ght catch fire.
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PERIODIC MAINTENANCE AND ADJUSTMENT
6-3
6
EAU46872
TIPThe annual checks must b e performed every year, except if a kilometer- based maintenance, or for the UK, a
milea ge- base d maintenance, is performe d instead .
 From 30000 km (17500 mi), repeat the maintenance intervals starting from 6000 km (3500 mi).
 Items marked with an asterisk should be performed by a Yamaha dealer as they require special tools, data and tech-
nical skills.
EAU46921
Perio dic maintenance chart for 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. √√√√√
2Spark plu g• Check condition.
• Clean and regap.
√√
• Replace. √√
3 *Va l ve s • Check valve clearance.
•Adjust.
√√√√
4 *Fuel injection • Check engine idle speed. √√√√√√
5 *Air in
duction sys-
tem • Check the air cut-off valve, reed
valve, and hose for damage.
• Replace any damaged parts if necessary. √√√√√
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PERIODIC MAINTENANCE AND ADJUSTMENT
6-14
6
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.
EAU21568
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 b e
checked and a djuste d on col d
tires (i.e., when the temperature
of the tires equals the am bient
temperature).
 The tire air pressure must b e
a d juste d in accor dance with the
ri din g speed and with the total wei
ght of ri der, passen ger, car-
g o, an d accessories approve d
for this mo del.
WARNING
EWA10512
Never overloa d your vehicle. Opera-
tion of an overloa ded vehicle coul d
cause an acci dent.
Tire air pressure (measure d on col d
tires): Up to 90 k g (198 l b) loa d:
Front:
175 kPa (1.75 kgf/cm², 25 psi)
Rear: 200 kPa (2.00 kgf/cm², 29 psi)
90 k g (198 l b) to maximum loa d:
Front: 175 kPa (1.75 kgf/cm², 25 psi)
Rear: 280 kPa (2.80 kgf/cm², 41 psi)
Maximum loa d*:
194 kg (428 lb)
* Total weight of rider, passenger, car- go and accessories
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PERIODIC MAINTENANCE AND ADJUSTMENT
6-36
6
6. Remove the axle nut, and then pull
the wheel axle out.
7. Push the wheel forward, and then remove the drive chain from the
rear sprocket.
TIPThe drive chain does not need to be
disassembled in order to remove and
install the wheel.8. Remove the wheel.
To install the rear wheel 1. Install the wheel by inserting the wheel axle from the left-hand side.
2. Install the drive chain onto the rear sprocket.
3. Install the axle nut.
4. Install the brake rod onto the brake camshaft lever, and then in-
stall the brake pedal free play ad-
justing nut onto the brake rod.
5. Connect the brake torque rod to the brake shoe plate by installing
the bolt and nut.
6. Adjust the drive chain slack. (See page 6-21.) 7. Take the motorcycle off the cen-
terstand so that the rear wheel is
on the ground, and then put the
sidestand down.
8. Tighten the brake torque rod nut and axle nut to the specified
torques.
9. Insert a new cotter pin.
10. Adjust the brake pedal free play. (See page 6-18.)
WARNING
EWA10661
After a djustin g the brake ped al free
play, check the operation of the
b rake li ght.
EAU25852
Trou bleshootin gAlthough Yamaha motorcycles receive
a thorough inspection before shipment
from the factory, trouble may occur
during operation. Any problem in the
fuel, compression, or ignition systems,
for example, can cause poor starting
and loss of power.
The following troubleshooting chart
represents a quick and easy procedure
for checking these vital systems your-
self. However, should your motorcycle
require any repair, take it to a Yamaha
dealer, whose skilled technicians have
the necessary tools, experience, and
know-how to service the motorcycle
properly.
Use only genuine Yamaha replace-
ment parts. Imitation parts may look
like Yamaha parts, but they are often
inferior, have a shorter service life and
can lead to expensive repair bills.
WARNING
EWA15142
When checkin g the fuel system, d o
not smoke, an d make sure there are
no open flames or sparks in the ar-
ea, inclu din g pilot li ghts from water
Ti ghtenin g torques:
Brake torque rod nut: 19 Nm (1.9 m·kgf, 14 ft·lbf)
Axle nut:
80 Nm (8.0 m·kgf, 58 ft·lbf)
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PERIODIC MAINTENANCE AND ADJUSTMENT
6-38
6
EAU45734
Troubleshootin g chart
Check 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
or the kickstarter.4. Compression
There is compression.
There is no compression.
Have a Yamaha dealer check the vehicle.The engine does not start.
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.
The engine does not start.
Check the ignition.
Operate the electric starter.2. Battery
The engine turns over
quickly.
The engine turns over
slowly.
The battery is good.Check the battery lead connections,
and have a Yamaha dealer charge
the battery if necessary.
DryWet
Operate the electric starter
or the kickstarter.
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MOTORCYCLE CARE AND STORAGE7-2
7
off any
deter gent resi due usin g
plenty of water, as it is harmful
to plastic parts.
 Do not use any harsh chemical
prod ucts on plastic parts. Be
sure to avoi d usin g cloths or
spon ges which have b een in
contact with stron g or a brasive
cleanin g prod ucts, solvent or
thinner, fuel ( gasoline), rust re-
movers or inhi bitors, brake flui d,
antifreeze or electrolyte.
 Do not use hi gh-pressure wash-
ers or steam-jet cleaners since
they cause water seepag e and
d eterioration in the followin g ar-
eas: seals (of wheel an d swin g-
arm bearin gs, fork an d b rakes),
electric components (couplers,
connectors, instruments,
switches an d li ghts), breather
hoses an d vents.
 For motorcycles equippe d with
a win dshiel d: Do not use stron g
cleaners or har d spon ges as
they will cause dullin g or
sc

ratchin g. Some cleanin g
compoun ds for plastic may
leave scratches on the win d- shiel
d. Test the pro duct on a
small hi dden part of the win d-
shiel d to make sure that it does
not leave any marks. If the win d-
shiel d is scratche d, use a quality
plastic polishin g compoun d af-
ter washing .
After normal useRemove dirt with warm water, a mild
detergent, and a soft, clean sponge,
and then rinse thoroughly with clean
water. Use a toothbrush or bottlebrush
for hard-to-reach areas. Stubborn dirt
and insects will come off more easily if
the area is covered with a wet cloth for
a few minutes before cleaning.
After riding in the rain, near the sea oron salt-sprayed roadsSince sea salt or salt sprayed on roads
during winter are extremely corrosive
in combination with water, carry out
the following steps after each ride in
the rain, near the sea or on salt-
sprayed roads.
TIPSalt sprayed on roads in the winter
may remain well into spring.1. Clean the motorcycle with cold
water and a mild detergent, after
the engine has cooled down.
NOTICE: Do not use warm wa-
ter since it increases the corro-
sive action of the salt.
[ECA10792]
2. Apply a corrosion protection spray on all metal, including chrome-
and nickel-plated, surfaces to pre-
vent corrosion.
Cleaning the windshieldAvoid using any alkaline or strong acid
cleaner, gasoline, brake fluid, or any
other solvent. Clean the windshield
with a cloth or sponge dampened with
a mild detergent, and then wash it off
thoroughly with water. For additional
cleaning, use Yamaha Windshield
Cleaner or another high-quality wind-
shield cleaner. Some cleaning com-
pounds for plastics may leave
scratches on the windshield. Before
using such cleaners, test an area of the
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MOTORCYCLE CARE AND STORAGE7-4
7
EAU43203
StorageShort-term
Always store your motorcycle 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 mo-
torcycle.NOTICE
ECA10811
 Storin g the motorcycle in a
poorly ventilate d room or cover-
in g it with a tarp, while it is still
wet, will allow water an d humi d-
ity to seep in an d cause rust.
 To prevent corrosion, avoi d
d amp cellars, sta bles ( because
of the presence of ammonia)
an d areas where stron g chemi-
cals are store d.Lon g-term
Before storing your motorcycle for sev-
eral 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 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 damag e or injury
from sparkin g, make sure to
g roun d the spark plu g elec-
tro des while turnin g the en-
g ine 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 motorcycle 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 char- ge it. Store it in a cool, dry place
and charge it once a month. Do
not store the battery in an exces-
sively 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
6-28.TIPMake any necessary repairs before
storing the motorcycle.
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SPECIFICATIONS
8-1
8
Dimensions:Overall length:1985 mm (78.1 in)
Overall width:
745 mm (29.3 in)
Overall height: 1100 mm (43.3 in)
Seat height: 780 mm (30.7 in)
Wheelbase:
1290 mm (50.8 in)
Ground clearance: 160 mm (6.30 in)
Minimum turning radius: 2080 mm (81.9 in)Wei ght:Curb weight:
126 kg (278 lb)Engine:Engine type:
Air cooled 4-stroke, SOHC
Cylinder arrangement: Single cylinder
Displacement: 124 cm³
Bore × stroke:
54.0 × 54.0 mm (2.13 × 2.13 in)
Compression ratio: 10.00 : 1
Starting system: Electric starter and kickstarter
Lubrication system:
Wet sump
Engine oil:Recommended brand:
YAMALUBE
Type:
SAE 10W-30, 10W-40, 10W-50, 15W-40,
20W-40 or 20W-50
Recommended engine oil grade: API service SG type or higher, JASO
standard MA
Engine oil quantity:
Periodic oil change: 1.00 L (1.06 US qt, 0.88 Imp.qt)Air filter:Air filter element:Dry elementFuel:Recommended fuel:
Regular unleaded gasoline (Gasohol (E10)
acceptable)
Fuel tank capacity:
13.0 L (3.43 US gal, 2.86 Imp.gal)
Fuel reserve amount: 3.4 L (0.90 US gal, 0.75 Imp.gal)
Fuel injection:Throttle body:ID mark: 51D1 00Spark plu g(s):Manufacturer/model:
NGK/CR6HSA
Spark plug gap: 0.6–0.7 mm (0.024–0.028 in)Clutch:Clutch type:
Wet, multiple-discTransmission:Primary reduction ratio:3.400 (68/20)
Final drive:
Chain
Secondary reduction ratio: 3.214 (45/14)
Transmission type: Constant mesh 5-speed
Operation:
Left foot operation
Gear ratio: 1st:
2.643 (37/14)
2nd: 1.778 (32/18)
3rd: 1.316 (25/19)
4th:
1.045 (23/22)
5th: 0.875 (21/24)
–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
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10-1
10
INDEXAAir filter element, cleaning .................... 6-11
Auxiliary light bulb, replacing ................ 6-32BBattery .................................................. 6-28
Brake and clutch levers, checking and lubricating ........................................... 6-24
Brake fluid, changing ............................ 6-21
Brake fluid level, checking .................... 6-20
Brake lever .............................................. 3-5
Brake lever free play, checking............. 6-17
Brake light switches.............................. 6-19
Brake pads and shoes, checking ......... 6-19
Brake pedal............................................. 3-6
Brake pedal, checking and
lubricating ........................................... 6-25
Brake pedal free play, adjusting ........... 6-18CCables, checking and lubricating ......... 6-24
Care ........................................................ 7-1
Carrier ................................................... 3-10
Catalytic converters ................................ 3-8
Centerstand and sidestand, checking
and lubricating .................................... 6-25
Clutch lever ............................................. 3-5
Clutch lever free play, adjusting ........... 6-16DDimmer switch ........................................ 3-4
Drive chain, cleaning and lubricating .... 6-23
Drive chain slack................................... 6-21EEngine break-in....................................... 5-3
Engine idling speed, checking .............. 6-13
Engine oil .............................................. 6-10 Engine trouble warning light ................... 3-2
FFront fork, checking ............................. 6-26
Fuel ......................................................... 3-7
Fuel consumption, tips for reducing ...... 5-3
Fuel gauge .............................................. 3-4
Fuel tank cap .......................................... 3-6
Fuse, replacing ..................................... 6-29HHandlebar switches ................................ 3-4
Headlight bulb, replacing ..................... 6-30
High beam indicator light ....................... 3-2
Horn switch ............................................ 3-4IIdentification numbers ............................ 9-1
Ignition circuit cut-off system ............... 3-11
Indicator lights and warning light ........... 3-2KKickstarter .............................................. 3-9MMain switch/steering lock....................... 3-1
Maintenance and lubrication, periodic ... 6-4
Maintenance, emission control
system.................................................. 6-3
Matte color, caution ............................... 7-1
Model label ............................................. 9-1NNeutral indicator light ............................. 3-2PPanels, removing and installing .............. 6-7
Parking ................................................... 5-4
Part locations ......................................... 2-1SSafety information .................................. 1-1 Self-diagnosis device..............................3-3
Shifting ....................................................5-2
Shift pedal ...............................................3-5
Shift pedal, checking ............................6-18
Shock absorber assemblies, adjusting ...3-9
Sidestand ..............................................3-10
Spark plug, checking ..............................6-8
Specifications .........................................8-1
Speedometer unit ...................................3-3
Starting the engine ..................................5-1
Start switch .............................................3-4
Steering, checking ................................6-27
Storage ...................................................7-4
Swingarm pivots, lubricating ................6-26
TTachometer .............................................3-3
Tail/brake light bulb, replacing..............6-31
Throttle grip and cable, checking and
lubricating ...........................................6-24
Throttle grip free play, checking ...........6-13
Tires ......................................................6-14
Tool kit ....................................................6-2
Troubleshooting ....................................6-36
Troubleshooting chart ...........................6-38
Turn signal indicator lights ......................3-2
Turn signal light bulb, replacing ............6-32
Turn signal switch ...................................3-4VValve clearance .....................................6-14
Vehicle identification number ..................9-1WWheel bearings, checking .....................6-27
Wheel (front) ..........................................6-33
Wheel (rear) ...........................................6-35
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