engine YAMAHA YBR125 2007 Owner's Manual

CAUTION :
CAUTION :
Make sure the air filter is
properly seated in the air filter
case.
The engine should never be run
without the air filter installed.
Excessive piston and/or
cylinder wear may result.
Dirty Element Air Cleaner
causes excessive fuel
consumption and loss of
power.
Clean Element Air Cleaner after
every 2000 Kms.
The Element Air Cleaner should
be cleaned and lubricated more
frequently (every 1000 kms), if
Motorcycle is operated in very
dusty (e.g. unpaved, dust laden
roads) conditions.
Carburetor adjustmentThe carburetor is a vital part of the
engine and requires very sophisti-
cated adjustments. Most adjust-
ments should be left to a YAMAHA
dealer who has the professional
knowledge and experience to do so.
However, the following may be
serviced by the owner as part of
routine maintenance.
The carburetor is set at the
YAMAHA factory after many
tests. If the settings are changed,
poor engine performance and
damage may result.
PERIODIC MAINTENANCE AND MINOR REPAIR`
6-11
7. Pull the air filter elements over
the frame and install the air filter
in the case.
8. Install the Spring Wire
9. Install the air filter case cover
and panelCAUTION :NOTE :Ensure no distoration/proper
positioning of felt Seal 1 , if
damaged contact YAMAHA Dealer.Do not twist Element Air Cleaner.

NOTE :
NOTE :
NOTE :
Idle speed adjustmentA diagnostic tachometer must be
used for this procedure.
1. Attach the tachometer. Start the
engine and warm it up for a few
minutes at approximately 1,300
to 1,500 r/min. Occasionally rev
the engine to 4,000 to 5,000
r/min. The engine is warm when it
quickly responds to the throttle.
1. Throttle stop screw2. Set the idle to the specified
engine speed by adjusting the
throttle stop screw. Turn the
screw in direction a to increase
engine speed and in direction b
to decrease engine speed.
Standard idle speed:
1,300 ~ 1,500 r/min
If the specified idle speed cannot be
obtained by performing the above
adjustment, consult a
dealer.YAMAHA
Throttle cable free play
adjustmentBefore checking the throttle cable
free play, the engine idling speed
should be adjusted.
Adjust the throttle cable by turning
the adjusting nut so that specified
free play at the throttle grip is
obtained.
Free play:
3 ~ 7mm
PERIODIC MAINTENANCE AND MINOR REPAIR
6-12

KEEP RECOMMENDED TYRE PRESSURE IN BOTH THE TYRES
2. Locknut
3. Adjusting nut
1. Loosen the locknut.
2. Turn the adjusting nut in direction
a to increase free play and in
direction b to decrease free
play.
3. Tighten the locknut.Valve clearance adjustmentThe correct valve clearance
changes with use, resulting in
improper fuel/air supply or engine
noise. To prevent this, the valve
clearance must be adjusted
regularly. This adjustment however,
should be left to a YAMAHA dealer.
1. Tread depth
2. Side wallTyresTo ensure maximum performance,
long service and safe operation,
note the following:
1. Tyre air pressure
Always check and correct the
tyre pressure before operating
the Motorcycle.
PERIODIC MAINTENANCE AND MINOR REPAIR
6-13
1. Free play

CAUTION :
Front fork inspectionSecurely support the Motorcycle
so there is no danger of it falling
over.
1. Visual check
Check for scratches or damage
on the inner tube and traces of oil
leakage from the front fork.2. Operation check
Place the Motorcycle on a level
place.
a. Hold the Motorcycle in an
upright position and apply the
front brake.
b. Push down hard on the
handlebars several times and
check if the fork rebounds
smoothly.
If any damage or unsmooth
movement is found with the front
fork, consult a YAMAHA dealer.
Steering inspectionPeriodically inspect the condition of
the steering. Worn out or loose
steering bearings may be danger-
ous. Place a stand under the engine
to raise the front wheel off the
ground. Hold the lower end of the
front forks and try to move them
forward and backward. If any free
play can be felt, ask a YAMAHA
dealer to inspect and adjust the
steering. Inspection is easier if the
front wheel is removed.
PERIODIC MAINTENANCE AND MINOR REPAIR
6-23
WARNING

Ask YAMAHA dealer to inspect.compression check. Engine doesn't start, go to
Dry with
Black SootWet No compression.
There is compression
electrode. plug and check Remove spark Use kick starter.
Wipe clean with dry cloth
and correct spark plugGo to Ignition check. Enough fuel
No fuelGO TO compression check
in the fuel tank Check if there is fuel
Supply fuel.
Open the throttle half-way
and start the engine.
or replace spark plug.
WARNING
Never Check the fuel system while smoking or in the vicinity of an open flame.
PERIODIC MAINTENANCE AND MINOR REPAIR
6-33Ask YAMAHA
dealer to inspect.
Troubleshooting chart - For Starting
1. Fuel
2. Compression
3. Ignition
If Engine does not start
Contact YAMAHA dealer.

A. CLEANINGFrequent, thorough cleaning of your
Motorcycle will not only enhance its
appearance but will improve its
general performance and extend
the useful life of many components.1. Before cleaning the Motorcycle:
a. Block off the end of the exhaust
pipe to prevent water entry; a
plastic bag and strong rubber
band may be used.
b. Make sure the spark plug and all
filler caps are properly installed.
2. If the engine case is excessively
greasy, apply degreaser with a
paint brush. Do not apply
degreaser to the chain, sprockets,
or wheel axles.
3. Rinse the dirt and degreaser off
with a garden hose. Use only
enough pressure to do the job.Direct excessive Hose Pressure
may cause water Entry Into Wheel
Bearing, Front Fork Brakes,
Transmission Seals & Electrical
Parts, there-by leading to its
Detorioration.
7-1
Improper cleaning can damage
the cowlings, panels and other
plastic parts. Use only a soft,
clean cloth or sponge with mild
detergent and water to clean
plastic.
Do not use any harsh chemical
products on plastic parts.
Alaways use clean cloth or
sponge for cleaning the
Motorcycle.
CAUTION :4. After riding on dirty roads, wash
the Motorcycle with cold water
immediately. Do not use warm
water to clean the tyre.
5. Once the majority of the dirt has
been hosed off, wash all surfaces
with warm water and mild,
detergent-type soap. An old
toothbrush or bottle brush is
handy for hard-to-get-at places.
6. Rinse the Motorcycle off
immediately with clean water and
dry all surfaces with a chamois,
clean towel, or soft absorbent
cloth.
7. Dry the chain and lubricate it to
prevent rust.
CAUTION :CLEANING AND STORAGE

8. Clean the seat with a vinyl
upholstery cleaner to keep the
cover pliable and glossy.
9. Automotive-type wax may be
applied to all painted and chrome-
plated surfaces. Avoid
combination cleaner waxes. Many
contain abrasive which may mar
the paint or protective finish. When
finished, start the engine and let it
idle for several minutes.
B. STORAGELong term storage (60 days or more)
of your Motorcycle will require some
preventive procedures to guard
against deterioration. After thor-
oughly cleaning the Motorcycle,
prepare for storage as follows:
1. Drain the fuel tank, fuel lines, and
carburetor float bowl.
2. Remove the empty fuel tank, pour
a cup of SAE 10W30 or 20W40
motor oil in the tank, shake the
tank to coat the inner surfaces
thoroughly and drain off the
excess oil. Reinstall the tank.
3. Remove the spark plug, pour
about one tablespoon of SAE
10W30 or 20W40 motor oil in the
spark plug hole and reinstall the
spark plug. Kick the engine over
several times (with the ignition off)
to coat the cylinder wall with oil.
4. Remove the drive chain.
Thoroughly clean the chain withsolvent and lubricate it. Reinstall
the chain or store it in a plastic bag
(tied to frame for safe-keeping).
5. Lubricate all control cables.
6. Block up the frame to raise both
wheels off the ground.
7. Tie a plastic bag over the
exhaust pipe outlet to prevent
moisture from entering.
8. If storing in a humid or salt-air
atmosphere, coat all exposed
metal surfaces with a light film of
oil. Do not apply oil to any rubber
parts or the seat cover.
9. Remove the battery and charge it.
Store it in a dry place and
recharge it once a month. Do not
store the battery in an excessively
warm or cold place (less than 0ºC
or more than Ambient).
Make any necessary repairs before
storing the Motorcycle.
CLEANING AND STORAGE
7-2
NOTE :

SPECIFICATIONS
8-1
SpecificationsModel LIBERO (5TS8)
Dimensions
Kerb weight :(With Engine Oil &
90% Fuel in Tank)- 119Kg.
Engine ::
Overall length 2,000 mm
Overall width 730 mm
Overall height 1,050 mm
Seat height (Upto Rider) 800 mm
(Upto Pillion Rider) 850 mm
Wheelbase 1,290 mm
Ground clearance 173 mm
Minimum turning radius 2,000 mm
Engine type
Cylinder arrangement
Displacement
Bore x Stroke 49X56
Compression ratio 9 : 1
Starting system
Lubrication system
Maximum power 7.6
Maximum torque 0.80Air cooled 4-stroke,SOHC
Forward inclined single
cylinder
106 cm
mm
Kick starter
Wet sump
PS(5.59 KW) @ 7500
Kgm. @ 6000
3
RPM
RPM
EngineOil:
Capacity
Air filter:
Fuel :
Carburettor:Type:
:
Periodic oil change 1.0
Total amount
Type G
Fuel tank capacity
Reserve amount
Type Variable Venturi Type
Manufacturer M/S Keihin Fie PrivateBe sure to use motor oils that do not contain
antifriction modifiers. Passenger car motor oils (often
labelled Energy conserving) contain anti-friction
additives which will cause clutch and/or starter clutch
slippage, resulting in reduced component life and
poor engine performance.
YAMALUBE 4-Stroke motor
oil (20W40 type SG)
L
1.2 L (First fill/Overhaul)
Wet type element
asoline (Petrol)
13.0 Litres
1.7Litres
Limited India.
CAUTION :

1. Key identification numberKey identification numberThe key identification number is
stamped on the key.
Record this number in the space
provided and use it for reference
when obtaining a new key.
1. Frame serial numberThe frame serial number is stamped
into the steering head pipe on right
hand side.Frame serial number
1. Engine serial numberThe engine serial number is
stamped into the right hand
crankcase.Engine serial number
CUSTOMER INFORMATION
9-1

10-1
1. Check for any missing item(s), scratches in painted/plated part(s), saddle or other external
visual damages and take corrective action.
Check each of the following items individually and mention the corrective action (as per the
recommended specifications) in the boxes provided.2. Check for missing part(s), if any.A. FRAME
a. Brakes
Front : Free Play at Lever End (10 ~ 15 mm)
Rear :Free Play at Rear Brake (20 ~ 30 mm)
b. Clutch :Free Play at Lever End (10 ~ 15 mm)c. Throttle :Free Play at Throttle Grip (3 ~7 mm)d. Steering :Check for Free Movemente. Suspension
Front Fork : Check for any sticky movement
Rear Shock Abs : For Free Stroking & Setting on both
(To be filled in by the Dealer on receipt of the Motorcycle from YMIS)
Odo-Meter
ReadingDate of
Inspection
Frame
No.Engine
No.Date of
SaleFound OK
Set RightReplaced
Cleaned
Lubricated
RCL
S
PRE-DELIVERY INSPECTION REPORT
No.
service2.pmd11/3/2006, 8:50 PM 1