light YAMAHA YBR125 2007 User Guide

OPERATION AND IMPORTANT RIDING POINTS
Tips for reducing fuel
consumptionYour Motorcycle's fuel consumption
depends to a large extent on your
riding style. The following tips can
help reduce fuel consumption:
1. Warm up the engine before riding.
2. Move the strater Lever to “Off” as
soon as possible.
3. Shift up swiftly and avoid high
engine speeds during
acceleration.
4. Do not double-clutch or rev the
engine while shifting down and
avoid high engine speeds with no
load on the engine.
5. Turn off the engine instead of
letting it idle for an extended
length of time, i.e. in traffic jams, at
traffic lights or rail- road crossings.
6. Do not drive with excessive load
on the Motorcycle.
7. Plan your route in advance.
Running-inThere is never a more important
period in the life of your Motorcycle
than the period between zero and
1,000 kms. For this reason we ask
that you carefully read the following
material. Because the engine is brand
new, you must not put an excessive
load on it for the first 1,000 kms. The
various parts in the engine wear and
polish themselves to the correct
operating clearances. During this
period, prolonged full throttle
operation, or any condition which
might result in excessive heating of
the engine, must be avoided.Be sure to replace the engine
oil as per recommended
schedule.
1,000 kms and below :
Avoid prolonged full-throttle
operation. Vary speed
occasionally.
5-3
CAUTION :
8. Avoid frequent braking.
9. Always maintain your tyre
pressure as per recommendation
10. Get your motorcycle serviced
periodically after every 2000 kms.
If any engine trouble should occur
during the "Running-in" period,
consult a YAMAHA dealer
immediately.
CAUTION :

A. Spark plug gapSpark plug inspectionThe spark plug is an important engine
component and is easy to inspect.
The condition of the spark plug can
indicate the condition of the engine.
The ideal color on the white insulator
around the center electrode is a
medium-to-light tan color for a
Motorcycle that is being riddennormally. Do not attempt to diagnose
any problems yourself. Instead, take
the Motorcycle to a YAMAHA dealer.
You should periodically remove and
inspect the spark plug because heat
and deposits will cause the spark plug
to slowly break down and erode. If
electrode erosion becomes exces-
sive, or if carbon and other deposits
are excessive, you should replace the
spark plug with the specified plug.
Before installing the spark plug,
measure the electrode gap with a wire
thickness gauge; adjust the gap to
specification as necessary.
PERIODIC MAINTENANCE AND MINOR REPAIR
6-7
A.- Spark plug gap: 0.8 ±0.1 mm
When installing the plug, always
clean the gasket surface and use a
new gasket. Wipe off any grime from
the threads and tighten the spark plug
to the specified torque.
Tightening torque:
Spark plug:
12 ft-lb (1.75 m-kg)NOTE :If a torque wrench is not available
when you are installing a spark plug,
a good estimate of the correct
torque is 1/4 to 1/2 turn past finger
using a box spanner.
AALWAYS USE ONLY THE STANDARD RECOMMENDED MAKE AND TYPE OF
SPARK PLUG
Specified spark plug:
P-RA7HC-(CHAMPION)

NOTE :
ALWAYS CHANGE ENGINE OIL AT RECOMMENDED INTERVALS
FOR OPTIMUM ENGINE PERFORMANCE AND ENGINE LIFE
1. Engine oil filler capEngine oil1. Oil level measurement
a. Place the Motorcycle on the
centerstand. Warm up the engine
for several minutes.
Be sure the Motorcycle is positioned
straight up when checking the oil
level. A slight tilt toward the side can
result in false readings.
1. Maximum level
2. Minimum levelWait a few minutes until the oil level
settles before checking.
b. Unscrew the dipstick and rest it
on the threads of the oil filler hole.
The oil level should be between
the minimum and maximum mark
on the dip- stick. If the level is low,
add oil to raise it to the specified
level.
PERIODIC MAINTENANCE AND MINOR REPAIR
6-8
NOTE :
1. Dipstick2. Engine oil replacement
a. Warm up the engine for a few
minutes.
b. Stop the engine. Place an oil pan
under the engine and remove the
dipstick.
1
1

1. Adjusting NutRear brake adjustmentThe rear brake pedal free play
should be adjusted to 20 ~ 30 mm at
the brake pedal end. Turn the
adjusting nut in direction to
increase free play and in direction
to decrease free play.ç
è
a. Freeplay When it is impossible to make
the proper adjustment, ask a
YAMAHA dealer.
Check the operation of the
brake light after adjusting the
rear brake.
1. Brake light switch
2. Adjusting nutBrake light switch adjustmentThe rear brake light switch is acti-
vated by the brake pedal and is
properly adjusted when the brake
light comes on just before braking
takes effect. To adjust the rear
brake light switch, hold the switch
body so it does not rotate while
turning the adjusting nut.
Turn the adjusting nut in direction ç
to make the brake light come on
earlier.
Turn the adjusting nut in direction è
to make the brake light come on
later.
PERIODIC MAINTENANCE AND MINOR REPAIR
6-17
WARNING
1
2
çè

CAUTION :
5. After adjusting, be sure to tighten
each chain adjusting locknut.
Then tighten the axle nut to the
specified torque.Maintain chain slackness
within specified limits as per
specifications.
To maintain correct axle
alignment, Ensure the notch
on the adjuster is on the same
Mark on Left and Right Side.
Tightening torque:
Axle nut:
65 ft-lb (9.05 m-kg)
1. Cotter pin6. Insert a new cotter pin into the
axle nut and bend the end of the
cotter pin as shown. If the notch in
the axle nut and the cotter pin
hole do not match, tighten the nut
slightly to align them.
Always use a new cotter pin on
the axle nut.7 Adjust the free play in the
brake pedal.
Check the operation of the brake
light after adjusting the rear
brake.
PERIODIC MAINTENANCE AND MINOR REPAIR
6-20
WARNING
WARNING

1. Screw (2 Nos.)
2. Bolt (1Headlight bulb replacementIf the headlight bulb burns out,
replace the bulb as follows:
1. Remove the two screws from the
Head Light.
2. Loosen bolt.
3. Remove head light bezel assy.
Forward.
No.)1. Bulb holder
3. Remove headlight bulb holder
from bezel
1. Bulb (Halogen)Keep flammable products and
your hands away from the bulb
while it is on, as it is hot. Do not
touch the bulb until it cools down.
4. Remove the defective bulb.
5. Put a new bulb into position and
secure it in place with the bulb
holder.
6. Install the Head Light Assy.
7. If the headlight beam adjustment
is necessary, ask a YAMAHA
dealer to make adjustment.
PERIODIC MAINTENANCE AND MINOR REPAIR
6-27
WARNING
1

1. Indicator Screws (1 No.)Turn signal and taillight
bulb replacement1. Remove the screws and the
lense.
2. Push the bulb inward and turn it
counterclockwise.
3. Place a new bulb in the socket.
Push the bulb inward and turn it
clockwise until it engages into the
socket.
4. Install the lense and the
screws.1. Tail lamp Screws (2 Nos.)
Do not over-tighten the screws as
the lense may break.
Front wheel removalIt is advisable to have a
YAMAHA dealer service the
wheel.
Securely support the
Motorcycle so there is no
danger of it falling over.
PERIODIC MAINTENANCE AND MINOR REPAIR
6-28
WARNING
CAUTION :

Rear wheel installation1. Install the rear wheel and the
axle.
2. Install the axle nut.
3. Insert the brake rod into the
brake cam lever and install the
brake free play adjusting nut.
4. Install the tension bar onto the
brake shoe plate and tighten the
tension bar nut to the specified
tightening torque.
5. Take the Motorcycle off the
centerstand.
6. Tighten the axle nut to the
specified tightening torque.
Then install a new cotter pin.
Specified torque:
Tension bar nut:
14 ft-lb (1.9 m kg)
Axle nut:
65 ft-lb (9.05 m kg)Always use a new cotter pin.
Check the operation of the brake
light after adjusting the rear brake. 7. Adjust the rear brake pedal free
play. (See page 6-17.)
TroubleshootingAlthough YAMAHA Motorcycles
receive a rigid inspection before
shipment from the factory, trouble
may occur during operation. Any
problem in the fuel, compression, or
ignition systems can cause poor
starting and loss of power. The
troubleshooting chart describes a
quick, easy procedure for making
checks. If your Motorcycle requires
any repair, bring it to a YAMAHA
dealer. The skilled technicians at a
YAMAHA dealership have the tools,
experience, and know-how to
properly service your Motorcycle.
Use only genuine YAMAHA parts
on your Motorcycle. Imitation
parts may look like YAMAHA
parts, but they are often inferior.
Consequently, they have a shorter
service life and can lead to
expensive repair bills.
PERIODIC MAINTENANCE AND MINOR REPAIR
6-32
WARNINGWARNING

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
8-3
Wheels:
Brakes:
Suspension :
Shock absorberType:
Size:
Front :
Type Drum brake
Operation Right Hand lever
Front Telescopic fork
Rear
:
Front Coil spring/ oil damper
RearFront Spoke wheel
Rear Spoke wheel
Front 1.60 X 18
Rear 1.60 X 18
Rear :
Type Drum brake
Operation Right foot operation
Swing arm
Coil spring/ oil damperWheel travel:
Electrical:
Bulb voltage ,Wattage x Quantity:
Fuse:Front 120 mm
Rear: 90 mm
Ignition system: CDI (Digitally Timing
Generator system:
Type
Standard output 12V
Battery:
Type
Voltage, capacity
Headlight
Tail / Brake light
Front flasher light
Rear flasher light
Meter light
Neutral indicator light
High beam indicator light
Turn indicator light
Tuning Fork Logo 12V 3.4Wx1
MainAdvanced)
Flywheel magneto
Lead acid
12V 2.5AH
(Halogen-HS1) 12V 35W/ 35W x 1
12V 5W/21W x 1
12V10Wx2
12V10Wx2
12V3.4Wx2
12V3.4Wx1
12V3.4Wx1
12V1.7Wx2
1OA