2003 YAMAHA YBR125 stop start

Handlebar switches over rigt
1. “ENGINE STOP” switch, shuts the engine off 2. Starter switch
3-5“ENGINE STOP” switch
The engine stop switch is a safety device for use in an
emergency such as when the motorcycle overturns or if
trouble occurs in the throttle system. Turn the switch to
“
” to start the engine, and turn the switch to “ ” to
stop the engine.
Starter switch “ ”
The starter motor cranks the engine when pushing the
starter switch.
See starting instructions prior to starting the
engine.
CAUTION:
Handlebar switches over rigt
1. “ENGINE STOP” switch, shuts the engine off 2. Starter switch
3-5 “ENGINE STOP” switch
The engine stop switch is a safety device for use in an
emergency such as when the motorcycle overturns or if
trouble occurs in the throttle system. Turn the switch to
“
” to start the engine, and turn the switch to “ ” to
stop the engine.
Starter switch “ ”
The starter motor cranks the engine when pushing the
starter switch.
See starting instructions prior to starting the
engine.
CAUTION:

 If improper operation is noted, consult a Yamaha dealer
or other qualified mechanic immediately.
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Clutch switch operation check
Check the operation of the clutch switch against the
information below.
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↓ ↓
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TURN MAIN SWITCH TO “ON” AND
ENGINE STOP SWITCH TO “ ”.
TRANSMISSION IS IN GEAR.
PULL IN CLUTCH LEVER AND PUSH STARTER SWITCH.
ENGINE WILL START
CLUTCH SWITCH IS OK
WARNING:

 If improper operation is noted, consult a Yamaha dealer
or other qualified mechanic immediately.
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Clutch switch operation check
Check the operation of the clutch switch against the
information below.
↓
↓ ↓
↓
↓
TURN MAIN SWITCH TO “ON” AND
ENGINE STOP SWITCH TO “ ”.
TRANSMISSION IS IN GEAR.
PULL IN CLUTCH LEVER AND PUSH STARTER SWITCH.
ENGINE WILL START
CLUTCH SWITCH IS OK
WARNING:

4-8Wheels
To ensure maximum performance, long service, and safe
operation, note the following:
1. Always inspect the wheels before a ride. Check for
cracks, bends, or warpage of the wheel; be sure the
spokes are tight and undamaged. If any abnormal
condition exists in a wheel, consult a Yamaha dealer or
other qualified mechanic. Do not attempt even small
repairs to the wheel. If a wheel is deformed or cracked,
it must be replaced.
2. Tires and wheels should be balanced whenever either one is changed or replaced. Failure to have a wheel
balanced can result in poor performance, adverse
handling characteristics, and shortened tire life.
3. After installing a tire, ride conservatively to allow the tire to seat itself on the rim properly. Failure to allow
proper seating may cause tire failure, resulting in
damage to the motorcycle and injury to the rider.
Clutch
( See page 6-20 for details)
Check the free play in the clutch lever, and make sure the
lever operates properly. If the free play is incorrect, adjust
it.
Throttle grip (See page 6-24 for details)
Turn the throttle grip to see if it operates properly, and check
the free play.
Make sure the grip returns by spring force when released.
Ask a Yamaha dealer or other qualified mechanic to make
any necessary adjustments.
Fitting/Fasteners
Alway check the tightness of chassis fittings and fasteners
before a ride. Use the chart on page 6-5 to find the correct
torque.
Switches
Check the operation of the starter switch, main switch, “
Engine Stop” switch.
4-8Wheels
To ensure maximum performance, long service, and safe
operation, note the following:
1. Always inspect the wheels before a ride. Check for
cracks, bends, or warpage of the wheel; be sure the
spokes are tight and undamaged. If any abnormal
condition exists in a wheel, consult a Yamaha dealer or
other qualified mechanic. Do not attempt even small
repairs to the wheel. If a wheel is deformed or cracked,
it must be replaced.
2. Tires and wheels should be balanced whenever either one is changed or replaced. Failure to have a wheel
balanced can result in poor performance, adverse
handling characteristics, and shortened tire life.
3. After installing a tire, ride conservatively to allow the tire to seat itself on the rim properly. Failure to allow
proper seating may cause tire failure, resulting in
damage to the motorcycle and injury to the rider.
Clutch
( See page 6-20 for details)
Check the free play in the clutch lever, and make sure the
lever operates properly. If the free play is incorrect, adjust
it.
Throttle grip (See page 6-24 for details)
Turn the throttle grip to see if it operates properly, and check
the free play.
Make sure the grip returns by spring force when released.
Ask a Yamaha dealer or other qualified mechanic to make
any necessary adjustments.
Fitting/Fasteners
Alway check the tightness of chassis fittings and fasteners
before a ride. Use the chart on page 6-5 to find the correct
torque.
Switches
Check the operation of the starter switch, main switch, “
Engine Stop” switch.

5-2
Starting a cold engine
1. Turn the fuel cock to “ON”.
2. Turn the main switch to “ON” and the engine stop switch
to “ “.
3. Shift transmission into neutral.
NOTE:
When the transmission is in neutral, the neutral indicator
light should be on. If the light does not come on, ask a
Yamaha dealer to inspect it.
4. Fully open the starter (CHOKE) and completely close the throttle grip.
5. Start the engine by pushing the starter switch.
NOTE:
This motorcycle is equipped with a starting and an ignition
circuit cut-off switch.
1. The engine can be started only under the following conditions:
a. The transmission is in neutral.
b. The transmission is in gear and the clutch is disengaged.
2. The motorcycle must not be ridden when the sidestand is down. NOTE:
If the engine fails to start, release the starter switch, wait a
few seconds, then try again. Each attempt should be as
short as possible to preseve the battery. Do not crank the
engine more than 10 seconds on any one attempt.
6. After starting the engine, turn back the starter to an
intermediate position.
NOTE:
To obtain maximum engine life and service, do not ever
thoroughly accelerate it while the engine is cold.
7. After warming up the engine, turn back the starter (CHOKE) completely.
NOTE:
The engine is warm when it responds normally to the throttle
with the starter turned off.
5-2
Starting a cold engine
1. Turn the fuel cock to “ON”.
2. Turn the main switch to “ON” and the engine stop switch
to “ “.
3. Shift transmission into neutral.
NOTE:
When the transmission is in neutral, the neutral indicator
light should be on. If the light does not come on, ask a
Yamaha dealer to inspect it.
4. Fully open the starter (CHOKE) and completely close the throttle grip.
5. Start the engine by pushing the starter switch.
NOTE:
This motorcycle is equipped with a starting and an ignition
circuit cut-off switch.
1. The engine can be started only under the following conditions:
a. The transmission is in neutral.
b. The transmission is in gear and the clutch is disengaged.
2. The motorcycle must not be ridden when the sidestand is down. NOTE:
If the engine fails to start, release the starter switch, wait a
few seconds, then try again. Each attempt should be as
short as possible to preseve the battery. Do not crank the
engine more than 10 seconds on any one attempt.
6. After starting the engine, turn back the starter to an
intermediate position.
NOTE:
To obtain maximum engine life and service, do not ever
thoroughly accelerate it while the engine is cold.
7. After warming up the engine, turn back the starter (CHOKE) completely.
NOTE:
The engine is warm when it responds normally to the throttle
with the starter turned off.

TURN THE MAIN SWITCH TO “ON” AND ENGINE STOP SWITCH TO “ ”
5-3
Before going through the following steps, check the
function of the clutch switch (See page 3-15)
ADVERTENCIA:
IF TRANSMISSION IS IN GEARPULL IN CLUTCH LEVER
AND PUSH STARTER SWITCH; ENGINE WILL START
MOTORCYCLE CAN BE RIDDEN
IF TRANSMISSION IS IN NEUTRAL
PUSH STARTER SWITCH; ENGINE WILL START
PUT TRANSMISSION IN GEAR
MOTORCYCLE CAN BE RIDDEN
WARNING:
TURN THE MAIN SWITCH TO “ON” AND ENGINE STOP SWITCH TO “ ”
5-3
Before going through the following steps, check the
function of the clutch switch (See page 3-15)
ADVERTENCIA:
IF TRANSMISSION IS IN GEARPULL IN CLUTCH LEVER
AND PUSH STARTER SWITCH; ENGINE WILL START
MOTORCYCLE CAN BE RIDDEN
IF TRANSMISSION IS IN NEUTRAL
PUSH STARTER SWITCH; ENGINE WILL START PUT TRANSMISSION IN GEAR
MOTORCYCLE CAN BE RIDDEN
WARNING:

1. Do not coast for long periods with the engine off,and do not tow the motorcycle a long distance. Even
with gears in neutral, the transmission is only
properly lubricated when the engine is running.
Inadequate lubrication may damage the
transmission.
2. Always use the clutch when changing gears. The engine, transmission, and driveline are not
designed to withstand the shock of forced shifting
and can be damaged by shifting without using the
clutch.

Shifting
The transmission lets you control the amount of power you
have available at a given speed for starting, accelerating,
climbing hills, etc. The use of shift pedal is sho
wn in the
illustration (page 3-6).
To shift into NEUTRAL, depress the shift pedal repeatedly
until it reaches the end of its travel (you will feel a stop
when you are in first gear), then raise the pedal slightly.
CAUTION:
1. Do not coast for long periods with the engine off,
and do not tow the motorcycle a long distance. Even
with gears in neutral, the transmission is only
properly lubricated when the engine is running.
Inadequate lubrication may damage the
transmission.
2. Always use the clutch when changing gears. The engine, transmission, and driveline are not
designed to withstand the shock of forced shifting
and can be damaged by shifting without using the
clutch.

Shifting
The transmission lets you control the amount of power you
have available at a given speed for starting, accelerating,
climbing hills, etc. The use of shift pedal is sho
wn in the
illustration (page 3-6).
To shift into NEUTRAL, depress the shift pedal repeatedly
until it reaches the end of its travel (you will feel a stop
when you are in first gear), then raise the pedal slightly.
CAUTION:

5-6
Tips for reducing fuel consumption
Your 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. Turn off the starter lever 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 engine.
5. Turn off the engine instead of letting it idle for an extended lenght of time, i.e. in traffic jams, at traffic lights or railroad
crossings. Engine Break-in
There is never a more important period in the life of your
motorcycle than the period 1.000Km. 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 several hours of running.
During this period, prolonged full throttle operation, or any
condition which might result in excessive heating of the
engine must be avoided.
1. 0 ~ 150 Km:
Avoid operation above 1/3 throttle. Stop the engine and
let it cool for 5 to 10 minutes after every hour of
operation. Vary the speed of the motorcycle from time
to time. Do not operate it at one set throttle position.
5-6
Tips for reducing fuel consumption
Your 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. Turn off the starter lever 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 engine.
5. Turn off the engine instead of letting it idle for an extended lenght of time, i.e. in traffic jams, at traffic lights or railroad
crossings. Engine Break-in
There is never a more important period in the life of your
motorcycle than the period 1.000Km. 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 several hours of running.
During this period, prolonged full throttle operation, or any
condition which might result in excessive heating of the
engine must be avoided.
1. 0 ~ 150 Km:
Avoid operation above 1/3 throttle. Stop the engine and
let it cool for 5 to 10 minutes after every hour of
operation. Vary the speed of the motorcycle from time
to time. Do not operate it at one set throttle position.

6-8
e. Fill engine with oil. Install the oil filter cap and tighten.
NOTE:
Recommended engine oil classification; API Service “SH”
type or equivalent
Do not put in any chemical additives. Engine oil also
lubricates the clutch and additives could cause clutch
slippage.
Be sure no foreign material enters the crankcase. f. Start the engine and warm up for a few minutes.While warming up, check for oil leakage. If oil
leakage is found, stop the engine immediately, and
check for the cause.
g. Stop the engine and check the oil level.
After replacing the engine oil, be sure to check the oil
pressure.
Oil quantity: Total amount:
1.2 L ( 0.264 Imp gal, 0.317 US gal)
Periodic oil change:
1.0 L ( 0.220 Imp gal, 0.264 US gal)
Recommended oil:
Yamalube 4
CAUTION:
CAUTION:
CAUTION:
6-8
e. Fill engine with oil. Install the oil filter cap and tighten.
NOTE:
Recommended engine oil classification; API Service “SH”
type or equivalent
Do not put in any chemical additives. Engine oil also
lubricates the clutch and additives could cause clutch
slippage.
Be sure no foreign material enters the crankcase. f. Start the engine and warm up for a few minutes.While warming up, check for oil leakage. If oil
leakage is found, stop the engine immediately, and
check for the cause.
g. Stop the engine and check the oil level.
After replacing the engine oil, be sure to check the oil
pressure.
Oil quantity: Total amount:
1.2 L ( 0.264 Imp gal, 0.317 US gal)
Periodic oil change:
1.0 L ( 0.220 Imp gal, 0.264 US gal)
Recommended oil:
Yamalube 4
CAUTION:
CAUTION:
CAUTION: