TABLE OF CONTENTSSAFETY INFORMATION ..................1-1
Further safe-riding points ................1-5
DESCRIPTION ..................................2-1
Left view ..........................................2-1
Right view ........................................2-3
Controls and instruments.................2-5
INSTRUMENT AND CONTROL
FUNCTIONS.......................................3-1
Immobilizer system .........................3-1
Main switch/steering lock ................3-2
Indicator lights and
warning lights ..............................3-4
Speedometer ..................................3-5
Tachometer ....................................3-6
Multi-function display ......................3-6
Anti-theft alarm (optional) .............3-11
Handlebar switches ......................3-11
Front brake lever ..........................3-12
Rear brake lever ...........................3-13
ABS (for ABS models) ..................3-13
Fuel tank cap ................................3-14
Fuel ...............................................3-15
Catalytic converters ......................3-16
Securing bracket ...........................3-17
Seat ..............................................3-17
Storage compartments .................3-18
Travel trunk ..................................3-19
Adjusting the shock absorber
assemblies ................................3-20Sidestand ..................................... 3-21
Ignition circuit cut-off system ........ 3-21
Auxiliary DC jack .......................... 3-23
FOR YOUR SAFETY –
PRE-OPERATION CHECKS............. 4-1
OPERATION AND IMPORTANT
RIDING POINTS................................. 5-1
Starting the engine ......................... 5-1
Starting off ...................................... 5-2
Acceleration and deceleration ........ 5-3
Braking ........................................... 5-3
Tips for reducing fuel
consumption ............................... 5-4
Engine break-in .............................. 5-4
Parking ........................................... 5-5
PERIODIC MAINTENANCE AND
ADJUSTMENT................................... 6-1
Owner’s tool kit ............................... 6-2
Periodic maintenance chart for the
emission control system ............. 6-3
General maintenance and
lubrication chart .......................... 6-4
Removing and installing
the cowling and panel ................. 6-8
Checking the spark plug ................. 6-9
Engine oil ..................................... 6-10
Final transmission oil .................... 6-13
Coolant ......................................... 6-14Air filter and V-belt case air filter
elements ................................... 6-16
Adjusting the throttle grip free
play ........................................... 6-17
Valve clearance ........................... 6-18
Tires ............................................. 6-18
Cast wheels ................................. 6-20
Checking the front and
rear brake lever free play ......... 6-21
Checking the front and
rear brake pads ........................ 6-21
Checking the brake fluid level ...... 6-22
Changing the brake fluid .............. 6-24
Checking and lubricating
the cables ................................. 6-24
Checking and lubricating
the throttle grip and cable ......... 6-24
Lubricating the front and
rear brake levers ...................... 6-25
Checking and lubricating the
centerstand and sidestand ....... 6-25
Checking the front fork ................. 6-26
Checking the steering .................. 6-27
Checking the wheel bearings ....... 6-27
Battery ......................................... 6-27
Replacing the fuses ..................... 6-29
Replacing a headlight bulb .......... 6-30
Replacing a front turn signal light
bulb ........................................... 6-31
Replacing a tail/brake light bulb or
a rear turn signal light bulb ....... 6-31U2ABE2E0.book Page 1 Thursday, August 30, 2012 2:36 PM
DESCRIPTION
2-3
2
EAU32230
Right viewYP125R/YP125RA1. Grab bar (page 5-2)
2. Seat (page 3-17)
3. Coolant reservoir cap (page 6-14)
4. Battery (page 6-27)
5. Fuses (page 6-29)
6. Front brake pads (page 6-21)
7. Coolant level check window (page 6-14)8. Engine oil filler cap (page 6-10)
9. Rear brake pads (page 6-21)
10.Shock absorber assembly spring preload adjusting ring (page 3-20)U2ABE2E0.book Page 3 Thursday, August 30, 2012 2:36 PM
DESCRIPTION
2-4
2 YP125RA Business Edition / YP125R Sports
1. Grab bar (page 5-2)
2. Seat (page 3-17)
3. Coolant reservoir cap (page 6-14)
4. Battery (page 6-27)
5. Fuses (page 6-29)
6. Front brake pads (page 6-21)
7. Coolant level check window (page 6-14)
8. Engine oil filler cap (page 6-10)
9. Rear brake pads (page 6-21)10.Shock absorber assembly spring preload adjusting ring (page 3-20)
U2ABE2E0.book Page 4 Thursday, August 30, 2012 2:36 PM
INSTRUMENT AND CONTROL FUNCTIONS
3-3
3
EAU10684
LOCK
The steering is locked, and all electrical
systems are off. The key can be re-
moved.
To lock the steering1. Turn the handlebars all the way to
the left.
2. Push the key in from the “OFF” po-
sition, and then turn it to “LOCK”
while still pushing it.
3. Remove the key.To unlock the steering
Push the key in, and then turn it to
“OFF” while still pushing it.
EAU10941
(Parking)
The steering is locked, and the taillight,
license plate light and auxiliary lights
are on. The hazard lights and turn sig-
nal lights can be turned on, but all other
electrical systems are off. The key can
be removed.
The steering must be locked before the
key can be turned to “ ”.
NOTICE
ECA11020
Do not use the parking position for
an extended length of time, other-
wise the battery may discharge.
1. Push.
2. Turn.12
1. Push.
2. Turn.12
U2ABE2E0.book Page 3 Thursday, August 30, 2012 2:36 PM
INSTRUMENT AND CONTROL FUNCTIONS
3-23
3
EAUM2850
Auxiliary DC jack
WARNING
EWA14360
To prevent electrical shock or short-
circuiting, make sure that the cap is
installed when the auxiliary DC jack
is not being used.NOTICE
ECA15431
The accessory connected to the
auxiliary DC jack should not be used
with the engine turned off, and the
load must never exceed 30 W (2.5 A),
otherwise the fuse may blow or the
battery may discharge.This vehicle is equipped with an auxilia-
ry DC jack in the front storage compart-
ment.
A 12-V accessory connected to the
auxiliary jack can be used when the key
is in the “ON” position and should only
be used when the engine is running.
To use the auxiliary DC jack
1. Open the front storage compart-
ment lid. (See page 3-18.)
2. Turn the key to “OFF”.3. Remove the auxiliary DC jack cap.
4. Turn the accessory off.
5. Insert the accessory plug into the
auxiliary DC jack.
6. Turn the key to “ON”, and then
start the engine. (See page 5-1.)
7. Turn the accessory on.
1. Auxiliary DC jack cap
1. Auxiliary DC jack
11
U2ABE2E0.book Page 23 Thursday, August 30, 2012 2:36 PM
PERIODIC MAINTENANCE AND ADJUSTMENT
6-27
6
EAU45511
Checking the steering Worn 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 pe-
riodic maintenance and lubrication
chart.
1. Place the vehicle on the center-
stand. WARNING! To avoid inju-
ry, securely support the vehicle
so there is no danger of it falling
over.
[EWA10751]
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 steering.
EAU23291
Checking the wheel bearings The 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.
EAU34225
Battery The battery is located behind cowling
A. (See page 6-8.)
This model is equipped with a VRLA
(Valve Regulated Lead Acid) battery.
There is no need to check the electro-
lyte or to add distilled water. However,
the battery lead connections need to be
checked and, if necessary, tightened.
WARNING
EWA10760
●
Electrolyte is poisonous and
dangerous since it contains sul-
furic acid, which causes severe
burns. Avoid any contact with
1. Positive battery terminal
2. Negative battery terminal
3. Battery
U2ABE2E0.book Page 27 Thursday, August 30, 2012 2:36 PM
PERIODIC MAINTENANCE AND ADJUSTMENT
6-28
6skin, eyes or clothing and al-
ways shield your eyes when
working near batteries. In case
of contact, administer the fol-
lowing FIRST AID.
EXTERNAL: Flush with plenty
of water.
INTERNAL: Drink large quan-
tities of water or milk and im-
mediately call a physician.
EYES: Flush with water for 15
minutes and seek prompt
medical attention.
●
Batteries produce explosive hy-
drogen gas. Therefore, keep
sparks, flames, cigarettes, etc.,
away from the battery and pro-
vide sufficient ventilation when
charging it in an enclosed
space.
●
KEEP THIS AND ALL BATTER-
IES OUT OF THE REACH OF
CHILDREN.
To charge the battery
Have a Yamaha dealer charge the bat-
tery as soon as possible if it seems to
have discharged. Keep in mind that thebattery tends to discharge more quickly
if the vehicle is equipped with optional
electrical accessories.
NOTICE
ECA16521
To charge a VRLA (Valve Regulated
Lead Acid) battery, a special (con-
stant-voltage) battery charger is re-
quired. Using a conventional battery
charger will damage the battery.To store the battery
1. If the vehicle will not be used for
more than one month, remove the
battery, fully charge it, and then
place it in a cool, dry place.
NOTICE: When removing the
battery, be sure the key is
turned to “OFF”, then discon-
nect the negative lead before
disconnecting the positive lead.
[ECA16302]
2. If the battery will be stored for more
than two months, check it at least
once a month and fully charge it if
necessary.
3. Fully charge the battery before in-
stallation. NOTICE: When install-
ing the battery, be sure the keyis turned to “OFF”, then con-
nect the positive lead before
connecting the negative lead.
[ECA16840]
4. After installation, make sure that
the battery leads are properly con-
nected to the battery terminals.NOTICE
ECA16530
Always keep the battery charged.
Storing a discharged battery can
cause permanent battery damage.
U2ABE2E0.book Page 28 Thursday, August 30, 2012 2:36 PM
PERIODIC MAINTENANCE AND ADJUSTMENT
6-35
6
EAU42135
Troubleshooting charts Starting problems or poor engine performance
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.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.
U2ABE2E0.book Page 35 Thursday, August 30, 2012 2:36 PM