Page 7 of 96

SAFETY 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 and warning lights .............3-4
Turn signal indicator lights ...............3-4
High beam indicator light ................3-4
Engine trouble warning light ............3-4
ABS warning light
(for ABS models) ...........................3-4
Immobilizer system indicator light ....3-5
Speedometer ....................................3-5
Tachometer .......................................3-6
Multi-function display .......................3-6
Anti-theft alarm (optional) ...............3-11
Handlebar switches ........................3-11
Pass switch ....................................3-12
Dimmer switch ...............................3-12
Turn signal switch ..........................3-12
Horn switch ...................................3-12
Start switch ....................................3-12
Hazard switch ................................3-12
Front brake lever.............................3-12Rear 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
Adjusting the shock absorber
assemblies...................................3-19
Travel trunk .....................................3-20
Sidestand ........................................3-22
Ignition circuit cut-off system .........3-22
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 .................................6-2Periodic 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 ...........................................6-14
Air filter and V-belt case air filter
elements ......................................6-16
Adjusting the throttle cable free
play ..............................................6-17
Valve clearance ...............................6-18
Tires ................................................6-18
Cast wheels ....................................6-20
Checking the front and rear brake
lever free play ..............................6-20
Checking the front and rear brake
pads.............................................6-21
Checking the brake fluid level ........6-22
Changing the brake fluid ................6-23
Checking and lubricating the
throttle grip and cable .................6-23
Lubricating the front and rear
brake levers .................................6-24
Checking and lubricating the
centerstand and sidestand .........6-24
Checking the front fork ...................6-25
Checking the steering.....................6-26
TABLE OF CONTENTS
Page 16 of 96
EAU10420
Right view
YP125R/YP125RA
DESCRIPTION
2-3
2
1. Grab bar (page 5-2)
2. Seat (page 3-17)
3. Coolant reservoir cap (page 6-14)
4. Battery (page 6-26)
5. Fuses (page 6-28)
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 3-19)
Page 17 of 96
YP125RA Business Edition / YP125R Sports
DESCRIPTION
2-4
2
1. Grab bar (page 5-2)
2. Seat (page 3-17)
3. Coolant reservoir cap (page 6-14)
4. Battery (page 6-26)
5. Fuses (page 6-28)
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 3-19)
Page 27 of 96

If the engine oil is changed before the
oil change indicator comes on (i.e.
before the periodic oil change interval
has been reached), the indicator must
be reset after the oil change for the
next periodic oil change to be indica-
ted at the correct time. (See page
6-10).
The electrical circuit of the indicator
can be checked according to the
following procedure.
1. Turn the key to “ON”.
2. Check that the indicator comes
on for a few seconds and then
goes off.
3. If the indicator does not come on,
have a Yamaha dealer check the
electrical circuit.
V-belt replacement indicator “V-
BELT”
This indicator flashes every 18000 km
(10500 mi) when the V-belt needs to
be replaced.
The electrical circuit of the indicator
can be checked according to the
following procedure.
1. Turn the key to “ON”.2. Check that the indicator comes
on for a few seconds and then
goes off.
3. If the indicator does not come on,
have a Yamaha dealer check the
electrical circuit.
Self-diagnosis device
This model is equipped with a self-
diagnosis device for various electrical
circuits.
If a problem is detected in any of tho-
se circuits, the multi-function display
will indicate an error code.
If the multi-function display indicates
such an error code, note the code
number, and then have a Yamaha
dealer check the vehicle.
ECA11790
If the multi-function display indica-
tes an error code, the vehicle
should be checked as soon as pos-
sible in order to avoid engine
damage.
The self-diagnosis device also
detects problems in the immobilizer
system circuits.If a problem is detected in the immo-
bilizer system circuits, the immobilizer
system indicator light will flash and
the multi-function display will indicate
an error code when the key is turned
to “ON”.
TIP
If the multi-function display indicates
error code 52, this could be caused
by transponder interference. If this
error appears, try the following.
1. Error code display
1. Use the code re-registering key
to start the engine.
TIP
Make sure there are no other immobi-
NOTICE
INSTRUMENT AND CONTROL FUNCTIONS
3-9
3
Page 42 of 96
FOR YOUR SAFETY – PRE-OPERATION CHECKS
4-1
4
EAU15596
Inspect your vehicle each time you use it to make sure the vehicle is in safe operating condition. Always follow the ins-
pection and maintenance procedures and schedules described in the Owner’s Manual.
EWA11151
Failure to inspect or maintain the vehicle properly increases the possibility of an accident or equipment dama-
ge. Do not operate the vehicle if you find any problem. If a problem cannot be corrected by the procedures pro-
vided in this manual, have the vehicle inspected by a Yamaha dealer.
Before using this vehicle, check the following points:
WARNING
ITEM CHECKS PAGE
Fuel3-15
Engine oil 6-10
Final transmission oil 6-13
Coolant 6-14
Front brake 6-20, 6-21, 6-22
Page 53 of 96
PERIODIC MAINTENANCE AND ADJUSTMENT
6-5
6
ODOMETER READING
NO. ITEM CHECK OR MAINTENANCE JOBANNUAL
1000 km 6000 km 12000 km 18000 km 24000 kmCHECK
(600 mi) (3500 mi) (7000 mi) (10500 mi) (14000 mi)
9*Steering bearingsfor roughness. 3 3 3 3 3
based grease.Every 24000 km (14000 mi)
10 *Chassis fasteners
screws are properly tightened. 3 3 3 3 3
11Front brake lever
pivot shaft 3 3 3 3 3
12Rear brake lever
pivot shaft 3 3 3 3 3
Sidestand,
13 3 3 3 3 3
centerstand
based grease.
14 *Sidestand switch 3 3 3 3 3 3
15 *Front fork
leakage. 3 3 3 3
16 *Shock absorber
assembliesabsorbers for oil leakage. 3 3 3 3
When the oil change indicator flashes [5000 km (3000 mi)
3after the initial 1000 km (600 mi) and every 6000 km
17Engine oiland 6-10.)
(3500 mi) thereafter]
leakage.Every 3000 km (1800 mi) 3
18Engine oil filter
element 3 3 3
Page 54 of 96
PERIODIC MAINTENANCE AND ADJUSTMENT
6-6
6
ODOMETER READING
NO. ITEM CHECK OR MAINTENANCE JOBANNUAL
1000 km 6000 km 12000 km 18000 km 24000 kmCHECK
(600 mi) (3500 mi) (7000 mi) (10500 mi) (14000 mi)
19 *Cooling systemfor coolant leakage. 3 3 3 3 3
Every 3 years
20Final transmission 3 3 3oil
3 3 3
21 *V-beltWhen the V-belt replacement indicator flashes
[every 18000 km (10500 mi)]
22 *Front and rear brake
switches 3 3 3 3 3
3
23Moving parts and
cables 3 3 3 3
3
Throttle grip housing
24 * if necessary. 3 3 3 3 3
and cable
housing and cable.
25 *Lights, signals and
switches 3 3 3 3 3 3
Page 55 of 96
PERIODIC MAINTENANCE AND ADJUSTMENT
6-7
6
EAU38262
TIP
Engine air filter and V-belt air filter
This model’s engine air filter is equipped with a disposable oil-coated paper element, which must not be cleaned
with compressed air to avoid damaging it.
The engine air filter element needs to be replaced and the V-belt air filter element needs to be serviced more fre-
quently when riding in unusually wet or dusty areas.
Hydraulic brake service
After disassembling the brake master cylinders and calipers, always change the fluid. Regularly check the brake
fluid levels and fill the reservoirs as required.
Every two years replace the internal components of the brake master cylinders and calipers, and change the bra-
ke fluid.
Replace the brake hoses every four years and if cracked or damaged.