ECU YAMAHA YBR125 2014 Owners Manual

SAFETY INFORMATION
1-5
1operator and may limit control
ability, therefore, such accesso-
ries are not recommended.
 Use caution when adding electri-
cal accessories. If electrical ac-
cessories exceed the capacity of
the motorcycle’s electrical sys-
tem, an electric failure could re-
sult, which could cause a
dangerous loss of lights or engine
power.
Aftermarket Tires an d Rims
The tires and rims that came with your
motorcycle were designed to match
the performance capabilities and to
provide the best combination of han-
dling, braking, and comfort. Other
tires, rims, sizes, and combinations
may not be appropriate. Refer to page
6-14 for tire specifications and more in-
formation on replacing your tires.
Transportin g the Motorcycle
Be sure to observe following instruc-
tions before transporting the motorcy-
cle in another vehicle.  Remove all loose items from the
motorcycle. 
Check that the fuel cock (if
equipped) is in the “OFF” position
and that there are no fuel leaks.
 Point the front wheel straight
ahead on the trailer or in the truck
bed, and choke it in a rail to pre-
vent movement.
 Shift the transmission in gear (for
models with a manual transmis-
sion).
 Secure the motorcycle with tie-
downs or suitable straps that are
attached to solid parts of the mo-
torcycle, such as the frame or up-
per front fork triple clamp (and not,
for example, to rubber-mounted
handlebars or turn signals, or
parts that could break). Choose
the location for the straps carefully
so the straps will not rub against
painted surfaces during transport.
 The suspension should be com-
pressed somewhat by the tie-
downs, if possible, so that the mo-
torcycle will not bounce exces-
sively during transport.
U51DE1E0.book Page 5 Thursday, August 29, 2013 4:41 PM

INSTRUMENT AND CONTROL FUNCTIONS
3-7
3
EAU13222
FuelMake sure there is sufficient gasoline in
the tank.
WARNING
EWA10882
Gasoline and g asoline vapors are
extremely flamma ble. To avoi d fires
an d explosions an d to re duce the
risk of injury when refuelin g, follow
these instructions.1. Before refueling, turn off the en- gine and be sure that no one is sit-
ting on the vehicle. Never refuel
while smoking, or while in the vi-
cinity of sparks, open flames, or
other sources of ignition such as
the pilot lights of water heaters
and clothes dryers.
2. Do not overfill the fuel tank. When refueling, be sure to insert the
pump nozzle into the fuel tank filler
hole. Stop filling when the fuel
reaches the bottom of the filler
tube. Because fuel expands when
it heats up, heat from the engine or
the sun can cause fuel to spill out
of the fuel tank. 3. Wipe up any spilled fuel immedi-
ately. NOTICE: Immediately
wipe off spille d fuel with a clean,
d ry, soft cloth, since fuel may
d eteriorate painted surfaces or
plastic parts.
[ECA10072]
4. Be sure to securely close the fuel tank cap.
WARNING
EWA15152
Gasoline is poisonous an d can cau-
se injury or death. Han dle gasoline
with care. Never siphon gasoline by
mouth. If you shoul d swallow some
g asoline or inhale a lot of g asoline
vapor, or g et some gasoline in your
eyes, see your d octor immediately. If g
asoline spills on your skin, wash
with soap an d water. If gasoline
spills on your clothin g, chan ge your
clothes.
EAU49742
NOTICE
ECA11401
Use only unlea ded g asoline. The use
of lea ded g asoline will cause severe
d amag e to internal en gine parts,
such as the valves an d piston rin gs,
as well as to the exhaust system.Your Yamaha engine has been de-
signed to use regular unleaded gaso-
line with a research octane number of
95 or higher. If knocking (or pinging)
occurs, use a gasoline of a different
1. Fuel tank filler tube
2. Maximum fuel level
1 2
Recommen ded 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)
U51DE1E0.book Page 7 Thursday, August 29, 2013 4:41 PM

PERIODIC MAINTENANCE AND ADJUSTMENT
6-7
6
EAU18772
Removing an d installin g pan-
elsThe panels shown need to be removed
to perform some of the maintenance
jobs described in this chapter. Refer to
this section each time a panel needs to
be removed and installed.
EAU56120
Panel A
To remove the panel1. Remove the bolt. 2. Pull the front of the panel out, and
then slide the panel forward to re-
lease it in the rear.
To install the panel
1. Secure the rear of the panel, and then push the front of the panel in.
2. Install the bolt.
1. Panel A
1
1. Panel B
1. Bolt
1
1
U51DE1E0.book Page 7 Thursday, August 29, 2013 4:41 PM

PERIODIC MAINTENANCE AND ADJUSTMENT
6-8
6
Panel B
To remove the panel
1. Slide the panel lock cover open,
insert the key into the lock, and
then turn it 1/4 turn clockwise.
2. Pull the front of the panel out with the key inserted in the lock, and
then slide the panel forward to re-
lease it in the rear. To install the panel
1. Secure the rear of the panel, and
then push the front of the panel in
with the key inserted in the lock.
2. While pushing the panel inward, turn the key counterclockwise to
the original position, remove it,
and then close the panel lock cov-
er.
EAU19605
Checkin g the spark plu gThe 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 main-
tenance and lubrication chart. In addi-
tion, the condition of the spark plug
can reveal the condition of the engine.
To remove the spark plu g
1. Remove the spark plug cap.
2. Remove the spark plug as shown, with the spark plug wrench includ-
ed in the owner’s tool kit.
1. Panel lock cover
2. Unlock.
1
2
1. Spark plug cap
U51DE1E0.book Page 8 Thursday, August 29, 2013 4:41 PM

PERIODIC MAINTENANCE AND ADJUSTMENT
6-26
6
EAUM1653
Lubricatin g the swin garm piv-
otsThe swingarm pivots must be lubricat-
ed by a Yamaha dealer at the intervals
specified in the periodic maintenance
and lubrication chart.
EAU23273
Checkin g the front forkThe condition and operation of the
front fork must be checked as follows
at the intervals specified in the periodic
maintenance and lubrication chart.
To check the con dition
Check the inner tubes for scratches,
damage and excessive oil leakage.
To check the operation 1. Place the vehicle on a level surfa- ce and hold it in an upright posi-
tion. WARNING! To avoi d injury,
securely support the vehicle so
there is no dan ger of it fallin g
over.
[EWA10752]
2. While applying the front brake, push down hard on the handle-
bars several times to check if the
front fork compresses and re-
bounds smoothly.
Recommen ded lu bricant:
Lithium-soap-based grease
Recommen ded lu bricant:
Lithium-soap-based grease
U51DE1E0.book Page 26 Thursday, August 29, 2013 4:41 PM

PERIODIC MAINTENANCE AND ADJUSTMENT
6-27
6
NOTICE
ECA10591
If any damage is foun d or the front
fork does not operate smoothly,
have a Yamaha d ealer check or re-
pair it.
EAU45512
Checkin g the steerin gWorn or loose steering bearings may
cause danger. Therefore, the operation
of the steering must be checked as fol-
lows at the intervals specified in the
periodic maintenance and lubrication
chart.
1. Place the vehicle on the center- stand. WARNING! To avoi d inju-
ry, securely support the vehicle
so there is no dan ger of it fallin g
over.
[EWA10752]
2. Hold the lower ends of the front fork legs and try to move them for-
ward and backward. If any free
play can be felt, have a Yamaha
dealer check or repair the steer-
ing.
EAU23292
Checkin g the wheel bearin gsThe front and rear wheel bearings must
be checked at the intervals specified in
the periodic maintenance and lubrica-
tion chart. If there is play in the wheel
hub or if the wheel does not turn
smoothly, have a Yamaha dealer
check the wheel bearings.
U51DE1E0.book Page 27 Thursday, August 29, 2013 4:41 PM

PERIODIC MAINTENANCE AND ADJUSTMENT
6-31
62. Disconnect the headlight coupler,
and then remove the bulb cover.
3. Unhook the headlight bulb holder, and then remove the burnt-out
bulb. 4. Place a new headlight bulb into
position, and then secure it with
the bulb holder.
5. Install the headlight bulb cover, and then connect the coupler.
6. Install the headlight cowling (to- gether with the headlight unit) by
placing it in the original position,
and then installing the bolts.
7. Have a Yamaha dealer adjust the headlight beam if necessary.
EAU24134
Replacin g the tail/ brake li ght
b ul b1. Remove the tail/brake light lens by
removing the screws.
2. Remove the burnt-out bulb by pushing it in and turning it coun-
terclockwise.
1. Bolt
1. Headlight coupler
2. Headlight bulb cover
1
1
2
1. Headlight bulb holder
1
1. Screw
U51DE1E0.book Page 31 Thursday, August 29, 2013 4:41 PM

PERIODIC MAINTENANCE AND ADJUSTMENT
6-33
64. Insert a new bulb into the socket.
5. Install the socket (together with
the bulb) by pushing it in.
6. Install the headlight unit.
EAU24361
Front wheel
EAU56302
To remove the front wheel
WARNING
EWA10822
To avoi d injury, securely support the
vehicle so there is no dan ger of it
fallin g over.1. Remove the rubber cap, and then
loosen the wheel axle nut.
2. Place the motorcycle on the cen- terstand. 3. Disconnect the speedometer ca-
ble from the front wheel.
4. Remove the wheel axle nut and the washer.
5. Pull the wheel axle out, and then remove the wheel. NOTICE: Do
not apply the b rake after the
wheel an d b rake disc have b een
remove d, otherwise the brake
pa ds will be forced shut.
[ECA11073]
1. Auxiliary light bulb
1
1. Rubber cap
2. Axle nut
3. Washer
1. Speedometer cable
U51DE1E0.book Page 33 Thursday, August 29, 2013 4:41 PM

PERIODIC MAINTENANCE AND ADJUSTMENT
6-35
6
EAU25081
Rear wheel
EAU56650
To remove the rear wheel
WARNING
EWA10822
To avoid injury, securely support the
vehicle so there is no dan ger of it
fallin g over.1. Loosen the axle nut and the brake
torque rod nut at the brake shoe
plate.
2. Disconnect the brake torque rod from the brake shoe plate by re-
moving the brake torque rod cot-
ter pin, the nut, and the bolt. 3. Place the motorcycle on the cen-
terstand.
4. Remove the brake pedal free play adjusting nut, and then discon-
nect the brake rod from the brake
camshaft lever. 5. Loosen the drive chain puller lock-
nut and the drive chain slack ad-
justing bolt on both ends of the
swingarm.
1. Axle nut
2. Brake torque rod
3. Brake torque rod nut and bolt
4. Brake torque rod cotter pin
13
2
4
1. Brake pedal free play adjusting nut
2. Brake rod
3. Brake camshaft lever
1. Wheel axle
2. Drive chain puller locknut
3. Drive chain slack adjusting bolt
3
1
2
U51DE1E0.book Page 35 Thursday, August 29, 2013 4:41 PM