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
2-1
2
EAU32220
Left viewYP125R/YP125RA1. Headlight (page 6-30)
2. Fuel tank cap (page 3-14)
3. Owner’s tool kit (page 6-2)
4. V-belt case air filter element (page 6-16)
5. Rear storage compartment (page 3-18)
6. Air filter element (page 6-16)
7. Shock absorber assembly spring preload adjusting ring (page 3-20)8. Engine oil drain bolt (page 6-10)
9. Centerstand (page 6-25)
10.Sidestand (page 3-21)U2ABE2E0.book Page 1 Thursday, August 30, 2012 2:36 PM
DESCRIPTION
2-2
2 YP125RA Business Edition / YP125R Sports
1. Headlight (page 6-30)
2. Fuel tank cap (page 3-14)
3. Owner’s tool kit (page 6-2)
4. V-belt case air filter element (page 6-16)
5. Rear storage compartment (page 3-18)
6. Air filter element (page 6-16)
7. Shock absorber assembly spring preload adjusting ring (page 3-20)
8. Engine oil drain bolt (page 6-10)
9. Centerstand (page 6-25)10.Sidestand (page 3-21)
U2ABE2E0.book Page 2 Thursday, August 30, 2012 2:36 PM
OPERATION AND IMPORTANT RIDING POINTS
5-4
5
EAU16820
Tips for reducing fuel con-
sumption Fuel consumption depends largely on
your riding style. Consider the following
tips to reduce fuel consumption:●
Avoid high engine speeds during
acceleration.
●
Avoid high engine speeds with no
load on the engine.
●
Turn the engine off instead of let-
ting it idle for an extended length of
time (e.g., in traffic jams, at traffic
lights or at railroad crossings).
EAU16830
Engine break-in There is never a more important period
in the life of your engine than the period
between 0 and 1000 km (600 mi). For
this reason, you should read the follow-
ing material carefully.
Since the engine is brand new, do not
put an excessive load on it for the first
1000 km (600 mi). The various parts in
the engine wear and polish themselves
to the correct operating clearances.
During this period, prolonged full-throt-
tle operation or any condition that might
result in engine overheating must be
avoided.
EAUS1840
0–500 km (0–300 mi)
Avoid prolonged operation above 5000
r/min.
500–1000 km (300–600 mi)
Avoid prolonged operation above 7500
r/min. NOTICE: After 1000 km (600
mi) of operation, be sure to replace
the engine oil, final transmission oil
and the oil filter element.
[ECA12931]
1000 km (600 mi) and beyond
The vehicle can now be operated nor-
mally.NOTICE
ECA10310
●
Keep the engine speed out of
the tachometer red zone.
●
If any engine trouble should oc-
cur during the engine break-in
period, immediately have a
Yamaha dealer check the vehi-
cle.
U2ABE2E0.book Page 4 Thursday, August 30, 2012 2:36 PM
PERIODIC MAINTENANCE AND ADJUSTMENT
6-5
6
10*Steering bearings Check bearing play and steering
for roughness.√√√√√
Lubricate with lithium-soap-based
grease.Every 24000 km (14000 mi)
11*Chassis fasteners Make sure that all nuts, bolts and
screws are properly tightened.√√√√√
12Front brake lever
pivot shaft Lubricate with silicone grease.√√√√√
13Rear brake lever
pivot shaft Lubricate with silicone grease.√√√√√
14Sidestand, center-
stand Check operation.
Lubricate with lithium-soap-based
grease.√√√√√
15*Sidestand switch Check operation.√√√√√√
16*Front fork Check operation and for oil leak-
age.√√√√
17*Shock absorber as-
semblies Check operation and shock ab-
sorbers for oil leakage.√√√√
18 Engine oil Change. (See pages 3-6 and
6-10.)√When the oil change indicator flashes [5000 km (3000 mi) after
the initial 1000 km (600 mi) and every 6000 km (3500 mi) thereaf-
ter]
Check oil level and vehicle for oil
leakage.Every 3000 km (1800 mi)√
19Engine oil filter ele-
ment Replace.√√√ NO. ITEM CHECK OR MAINTENANCE JOBODOMETER READING
ANNUAL
CHECK 1000 km
(600 mi)6000 km
(3500 mi)12000 km
(7000 mi)18000 km
(10500 mi)24000 km
(14000 mi)
U2ABE2E0.book Page 5 Thursday, August 30, 2012 2:36 PM
PERIODIC MAINTENANCE AND ADJUSTMENT
6-6
6
EAU38262
TIP●
Engine air filter and V-belt air filters
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 elements need to be serviced more frequent-
ly when riding in unusually wet or dusty areas.
20*Cooling system Check coolant level and vehicle
for coolant leakage.√√√√√
Change coolant. Every 3 years
21Final transmission
oil Check vehicle for oil leakage.√√ √
Change.√√√
22*V- b e l t Replace. When the V-belt replacement indicator flashes [every 18000 km (10500 mi)]
23*Front and rear brake
switches Check operation.√√√√√√
24Moving parts and
cables Lubricate.√√√√√
25*Throttle grip Check operation.
Check throttle grip free play, and
adjust if necessary.
Lubricate cable and grip housing.√√√√√
26*Lights, signals and
switches Check operation.
Adjust headlight beam.√√√√√√ NO. ITEM CHECK OR MAINTENANCE JOBODOMETER READING
ANNUAL
CHECK 1000 km
(600 mi)6000 km
(3500 mi)12000 km
(7000 mi)18000 km
(10500 mi)24000 km
(14000 mi)U2ABE2E0.book Page 6 Thursday, August 30, 2012 2:36 PM
PERIODIC MAINTENANCE AND ADJUSTMENT
6-11
6 4. If the engine oil is below the mini-
mum level mark, add sufficient oil
of the recommended type to raise
it to the correct level.
5. Insert the dipstick into the oil filler
hole, and then tighten the oil filler
cap.
To change the engine oil (with or
without oil filter element replace-
ment)
1. Start the engine, warm it up for
several minutes, and then turn it
off.
2. Place an oil pan under the engine
to collect the used oil.3. Remove the engine oil filler cap
and the engine oil drain bolt to
drain the oil from the crankcase.
4. Check the drain bolt washer for
damage and replace it if neces-
sary.
TIPSkip steps 5–9 if the oil filter element is
not being replaced.5. Remove the oil filter element cover
by removing the bolts.
6. Remove the oil filter element and
O-ring.
1. Engine oil filler cap
2. Maximum level mark
3. Minimum level mark
1
32
1
ZAUM0685
1. Engine oil drain bolt
1. Engine oil drain bolt
2. WasherZAUM0702
11
2
ZAUM0129
1. Oil filter element coverZAUM0711
1
U2ABE2E0.book Page 11 Thursday, August 30, 2012 2:36 PM
PERIODIC MAINTENANCE AND ADJUSTMENT
6-12
67. Check the O-ring for damage and
replace it if necessary.
8. Install the new oil filter element and
an O-ring.
9. Install the oil filter element cover by
installing the bolts, then tightening
them to the specified torque.
TIPMake sure that the O-ring is properly
seated.
10. Install the washer and the engine
oil drain bolt, and then tighten the
drain bolt to the specified torque.TIPMake sure that the washer is properly
seated.11. Refill with the specified amount of
the recommended engine oil, and
then install and tighten the oil filler
cap.TIPBe sure to wipe off spilled oil on any
parts after the engine and exhaust sys-
tem have cooled down.
NOTICE
ECA11670
●
Do not use oils with a diesel
specification of “CD” or oils of a
higher quality than specified. In
addition, do not use oils labeled
“ENERGY CONSERVING II” or
higher.
●
Be sure no foreign material en-
ters the crankcase.
12. Start the engine, and then let it idle
for several minutes while checking
it for oil leakage. If oil is leaking, im-
mediately turn the engine off and
check for the cause.
13. Turn the engine off, and then
check the oil level and correct it if
necessary.
14. Reset the oil change indicator.
To reset the oil change indicator
1. Turn the key to “ON”.
2. Hold the “OIL CHANGE” button
pushed for 15 to 20 seconds.
1. Oil filter element
2. O-ring
3. Oil filter element coverTightening torque:
Oil filter cover bolt:
10 Nm (1.0 m·kgf, 7.2 ft·lbf)1
2
3
ZAUM0712
Tightening torque:
Engine oil drain bolt:
20 Nm (2.0 m·kgf, 14 ft·lbf)
Recommended engine oil:
See page 8-1.
Oil change quantity:
Without oil filter element replace-
ment:
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)
U2ABE2E0.book Page 12 Thursday, August 30, 2012 2:36 PM