2010 YAMAHA YBR125 lock
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TABLE OF CONTENTSSAFETY INFORMATION ..................1-1
DESCRIPTION ..................................2-1
Left view ..........................................2-1
Right view ........................................2-2
Controls and instruments.................2-3
INSTRUMENT AND CONTROL
FUNCTIONS.......................................3-1
Main switch/steering lock ................3-1
Indicator and warning lights ............3-2
Speedometer unit ...........................3-3
Tachometer ....................................3-3
Self-diagnosis device ......................3-3
Fuel gauge ......................................3-4
Handlebar switches ........................3-4
Clutch lever .....................................3-5
Shift pedal .......................................3-5
Brake lever .....................................3-5
Brake pedal ....................................3-6
Fuel tank cap ..................................3-6
Fuel .................................................3-7
Catalytic converters ........................3-8
Kickstarter .......................................3-9
Adjusting the shock absorber
assemblies ..................................3-9
Carrier ...........................................3-10
Sidestand ......................................3-10
Ignition circuit cut-off system ........3-11FOR YOUR SAFETY –
PRE-OPERATION CHECKS............. 4-1
OPERATION AND IMPORTANT
RIDING POINTS................................. 5-1
Starting the engine ......................... 5-1
Shifting ........................................... 5-2
Tips for reducing fuel
consumption ............................... 5-3
Engine break-in .............................. 5-3
Parking ........................................... 5-4
PERIODIC MAINTENANCE AND
ADJUSTMENT................................... 6-1
Owner’s tool kit ............................... 6-1
Periodic maintenance chart for the
emission control system ............. 6-2
General maintenance and
lubrication chart .......................... 6-3
Removing and installing panels ..... 6-6
Checking the spark plug ................. 6-7
Engine oil ....................................... 6-9
Cleaning the air filter element ...... 6-10
Checking the engine idling
speed ........................................ 6-12
Checking the throttle cable free
play ........................................... 6-12
Valve clearance ............................ 6-13
Tires ............................................. 6-13
Cast wheels .................................. 6-15Adjusting the clutch lever free
play ........................................... 6-15
Checking the front brake lever free
play ........................................... 6-16
Adjusting the brake pedal free
play ........................................... 6-16
Checking the shift pedal .............. 6-17
Brake light switches ..................... 6-17
Checking the front brake pads
and rear brake shoes ............... 6-18
Checking the front brake fluid
level .......................................... 6-19
Changing the brake fluid .............. 6-20
Drive chain slack .......................... 6-20
Cleaning and lubricating the drive
chain ......................................... 6-22
Checking and lubricating the
cables ....................................... 6-22
Checking and lubricating the
throttle grip and cable ............... 6-23
Checking and lubricating the
brake and clutch levers ............ 6-23
Checking and lubricating the
brake pedal ............................... 6-24
Checking and lubricating the
centerstand and sidestand ....... 6-24
Lubricating the swingarm
pivots ........................................ 6-25
Checking the front fork ................. 6-25
Checking the steering .................. 6-26
Checking the wheel bearings ....... 6-26U51DE0E0.book Page 1 Monday, November 2, 2009 10:34 AM
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DESCRIPTION
2-3
2
EAU10430
Controls and instruments
1
2
3
4
5
6
7
8
9
10
1. Clutch lever (page 3-5)
2. Left handlebar switches (page 3-4)
3. Main switch/steering lock (page 3-1)
4. Speedometer (page 3-3)
5. Fuel gauge (page 3-4)
6. Tachometer (page 3-3)
7. Right handlebar switch (page 3-4)
8. Brake lever (page 3-5)9. Throttle grip (page 6-12)
10.Fuel tank cap (page 3-6)U51DE0E0.book Page 3 Monday, November 2, 2009 10:34 AM
Page 15 of 80
INSTRUMENT AND CONTROL FUNCTIONS
3-1
3
EAU10460
Main switch/steering lock The main switch/steering lock controls
the ignition and lighting systems, and is
used to lock the steering. The various
positions are described below.
EAU33590
ON
All electrical circuits are supplied with
power; the meter lighting, taillight and
auxiliary light come on, and the engine
can be started. The key cannot be re-
moved.TIPThe headlight comes on automatically
when the engine is started and stays on
until the key is turned to “OFF”, even if
the engine stalls.
EAU10661
OFF
All electrical systems are off. The key
can be removed.
WARNING
EWA10061
Never turn the key to “OFF” or
“LOCK” while the vehicle is moving.
Otherwise the electrical systems will
be switched off, which may result in
loss of control or an accident.
EAU43141
LOCK
The steering is locked, and all electrical
systems are off. The key can be re-
moved.To lock the steering
1. Turn the handlebars all the way to
the left.
2. Push the key in from the “OFF” po-
sition, and then turn it to “LOCK”
while still pushing it.
3. Remove the key.
LOCK
IGNITION
OFFON
PUSHON
OFF
LOCK
1. Push.
2. Turn.
LOCK
OFF
LOCK
OFF
12
U51DE0E0.book Page 1 Monday, November 2, 2009 10:34 AM
Page 16 of 80
INSTRUMENT AND CONTROL FUNCTIONS
3-2
3To unlock the steering
Insert the key and turn it to “OFF”.
EAU11004
Indicator and warning lights
EAU11030
Turn signal indicator lights“”
and“”
The corresponding indicator light flash-
es when the turn signal switch is
pushed to the left or right.
EAU11060
Neutral indicator light“”
This indicator light comes on when the
transmission is in the neutral position.
EAU11080
High beam indicator light“”
This indicator light comes on when the
high beam of the headlight is switched
on.
EAU11505
Engine trouble warning light“”
This warning light comes on or flashes
if a problem is detected in the electrical
circuit monitoring the engine. If this oc-
curs, have a Yamaha dealer check the
self-diagnosis system. (See page 3-3
for an explanation of the self-diagnosis
device.)
The electrical circuit of the warning light
can be checked by turning the key to
“ON”. The warning light should come
on for a few seconds, and then go off.
If the warning light does not come on
initially when the key is turned to “ON”,
or if the warning light remains on, have
a Yamaha dealer check the electrical
circuit.
1. Turn.
LOCKOFF
1
1. Left turn signal indicator light“”
2. Neutral indicator light“”
3. Engine trouble warning light“”
4. High beam indicator light“”
5. Right turn signal indicator light“”
5
4
3
2
1
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Page 20 of 80
INSTRUMENT AND CONTROL FUNCTIONS
3-6
3
EAU12941
Brake pedal The brake pedal is on the right side of
the motorcycle. To apply the rear
brake, press down on the brake pedal.
EAU13002
Fuel tank cap To remove the fuel tank cap
Insert the key into the lock and turn it
1/4 turn clockwise. The lock will be re-
leased and the fuel tank cap can be re-
moved.
To install the fuel tank cap
1. Push the fuel tank cap into position
with the key inserted in the lock.
2. Turn the key counterclockwise to
the original position, and then re-
move it.
TIPThe fuel tank cap cannot be installed
unless the key is in the lock. In addition,
the key cannot be removed if the cap is
not properly installed and locked.
WARNING
EWA11141
Make sure that the fuel tank cap is
properly installed before riding.
Leaking fuel is a fire hazard.
1. Brake pedal
1
1. Unlock.
1
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Page 39 of 80
PERIODIC MAINTENANCE AND ADJUSTMENT
6-7
6
EAU36961
Panel B
To remove the panel1. Slide the panel lock cover open, in-
sert the key into the lock, and then
turn it 1/4 turn clockwise.
2. Pull the front of the panel out with
the key inserted in the lock, and
then slide the panel forward to re-
lease it in the rear.To install the panel
1. Secure the rear of the panel, and
then push the front of the panel in
with the key inserted in the lock.
2. While pushing the panel inward,
turn the key counterclockwise to
the original position, remove it, and
then close the panel lock cover.
EAU19604
Checking the spark plug The spark plug is an important engine
component, which is easy to check.
Since heat and deposits will cause any
spark plug to slowly erode, the spark
plug should be removed and checked
in accordance with the periodic mainte-
nance and lubrication chart. In addition,
the condition of the spark plug can re-
veal the condition of the engine.
To remove the spark plug
1. Remove the spark plug cap.
2. Remove the spark plug as shown,
with the spark plug wrench includ-
ed in the owner’s tool kit.
1. Panel lock cover
2. Unlock.
1
2
1. Spark plug cap
U51DE0E0.book Page 7 Monday, November 2, 2009 10:34 AM
Page 47 of 80
PERIODIC MAINTENANCE AND ADJUSTMENT
6-15
6
EAU21960
Cast wheels To maximize the performance, durabil-
ity, and safe operation of your vehicle,
note the following points regarding the
specified wheels.
The wheel rims should be checked
for cracks, bends or warpage be-
fore each ride. If any damage is
found, have a Yamaha dealer re-
place the wheel. Do not attempt
even the smallest repair to the
wheel. A deformed or cracked
wheel must be replaced.
The wheel should be balanced
whenever either the tire or wheel
has been changed or replaced. An
unbalanced wheel can result in
poor performance, adverse han-
dling characteristics, and a short-
ened tire life.
Ride at moderate speeds after
changing a tire since the tire sur-
face must first be “broken in” for it
to develop its optimal characteris-
tics.
EAUP0130
Adjusting the clutch lever free
play The clutch lever free play should mea-
sure 10.0–15.0 mm (0.39–0.59 in) as
shown. Periodically check the clutch le-
ver free play and, if necessary, adjust it
as follows.
1. Slide the rubber cover back at the
clutch lever.
2. Loosen the locknut.
3. To increase the clutch lever free
play, turn the clutch lever free play
adjusting bolt in direction (a). Todecrease the clutch lever free play,
turn the adjusting bolt in direction
(b).
TIPIf the specified clutch lever free play
could be obtained as described above,
skip steps 4–7.4. Fully turn the adjusting bolt at the
clutch lever in direction (a) to loos-
en the clutch cable.
5. Loosen the clutch cable locknut,
located towards the center of the
cable.
6. To increase the clutch lever free
play, turn the clutch lever free play
adjusting nut in direction (a). To
1. Rubber cover
2. Locknut
3. Clutch lever free play adjusting bolt
4. Clutch lever free play4123
1. Locknut
2. Clutch lever free play adjusting nut
U51DE0E0.book Page 15 Monday, November 2, 2009 10:34 AM
Page 48 of 80
PERIODIC MAINTENANCE AND ADJUSTMENT
6-16
6decrease the clutch lever free play,
turn the adjusting nut in direction
(b).
7. Tighten the locknut at the clutch
cable.
8. Tighten the locknut at the clutch le-
ver, and then slide the rubber cov-
er to its original position.
EAUT1221
Checking the front brake lever
free play The brake lever free play should mea-
sure 0.0–7.0 mm (0.00–0.28 in) as
shown. Periodically check the brake le-
ver free play and, if necessary, have a
Yamaha dealer check the brake sys-
tem.
WARNING
EWA10641
An incorrect brake lever free play in-
dicates a hazardous condition in the
brake system. Do not operate the ve-
hicle until the brake system has
been checked or repaired by a
Yamaha dealer.
EAU39812
Adjusting the brake pedal free
play The brake pedal free play should mea-
sure 20.0–30.0 mm (0.79–1.18 in) at
the brake pedal end as shown. Period-
ically check the brake pedal free play
and, if necessary, adjust it as follows.
To increase the brake pedal free play,
turn the adjusting nut at the brake rod in
direction (a). To decrease the brake
pedal free play, turn the adjusting nut in
direction (b).
1. Brake lever free play
1. Brake pedal free play
U51DE0E0.book Page 16 Monday, November 2, 2009 10:34 AM