2010 YAMAHA WR 125R brake pads

PERIODIC MAINTENANCE AND ADJUSTMENT
6-20
6
EAU22321
Checking the front and rear
brake pads Front brake
Rear brakeThe front and rear brake pads must be
checked for wear at the intervals spec-
ified in the periodic maintenance and
lubrication chart. Each brake pad is
provided with a wear indicator groove,
which allows you to check the brake
pad wear without having to disassem-
ble the brake. To check the brake pad
wear, check the wear indicator
grooves. If a brake pad has worn to the
point that the wear indicator groove has
almost disappeared, have a Yamaha
dealer replace the brake pads as a set.
EAU22580
Checking the brake fluid level Front brake
Rear brake
Insufficient brake fluid may allow air to
enter the brake system, possibly caus-
ing it to become ineffective.
1. Wear indicator groove
1. Wear indicator groove
1. Minimum level mark
1. Minimum level mark
U22BE1E0.book Page 20 Wednesday, September 16, 2009 1:46 PM

PERIODIC MAINTENANCE AND ADJUSTMENT
6-21
6 Before riding, check that the brake fluid
is above the minimum level mark and
replenish if necessary. A low brake fluid
level may indicate worn brake pads
and/or brake system leakage. If the
brake fluid level is low, be sure to check
the brake pads for wear and the brake
system for leakage.
Observe these precautions:


When checking the fluid level,
make sure that the top of the brake
fluid reservoir is level.


Use only the recommended quality
brake fluid, otherwise the rubber
seals may deteriorate, causing
leakage and poor braking perfor-
mance.


Refill with the same type of brake
fluid. Mixing fluids may result in a
harmful chemical reaction and
lead to poor braking performance.


Be careful that water does not en-
ter the brake fluid reservoir when
refilling. Water will significantly
lower the boiling point of the fluid
and may result in vapor lock.


Brake fluid may deteriorate paint-
ed surfaces or plastic parts. Al-
ways clean up spilled fluid
immediately.


As the brake pads wear, it is nor-
mal for the brake fluid level to grad-
ually go down. However, if the
brake fluid level goes down sud-
denly, have a Yamaha dealer
check the cause.
EAUM1360
Changing the brake fluid Have a Yamaha dealer change the
brake fluid at the intervals specified in
the periodic maintenance and lubrica-
tion chart. In addition, have the brake
hose replaced every four years or
whenever it is damaged or leaking.
Recommended brake fluid:
DOT 4
U22BE1E0.book Page 21 Wednesday, September 16, 2009 1:46 PM

PERIODIC MAINTENANCE AND ADJUSTMENT
6-33
6 a jack either under each side of the
frame in front of the rear wheel or under
each side of the swingarm.
EAU24360
Front wheel
EAUM2632
To remove the front wheel
WARNING
EWA10821
To avoid injury, securely support the
vehicle so there is no danger of it
falling over.1. Loosen the front wheel axle pinch
bolts, then the wheel axle and the
brake caliper bolts.
2. Lift the front wheel off the ground
according to the procedure on
page 6-32.
3. Remove the speed sensor lead
holder by removing the screw
(WR125R only).
4. Remove the brake caliper by re-
moving the bolts.
5. Pull the wheel axle out, remove the
speed sensor by pulling it out, and
then remove the wheel. NOTICE:
Do not apply the brake after the
brake calipers have been re-
moved, otherwise the brake
pads will be forced shut.
[ECA11051]
1. Front wheel axle pinch bolt
2. Wheel axle
3. Speed sensor cable holder
1. Brake caliper
2. Brake caliper bolt
U22BE1E0.book Page 33 Wednesday, September 16, 2009 1:46 PM

PERIODIC MAINTENANCE AND ADJUSTMENT
6-34
6
EAUM2640
To install the front wheel
1. Lift the wheel up between the fork
legs.
2. Install the speed sensor at the
wheel hub.TIPMake sure that the projections on the
speed sensor rotor are aligned with the
notches in the wheel hub and that the
slot in the speed sensor fits over the re-
tainer on the fork leg.3. Insert the wheel axle.
4. Lower the front wheel so that it is
on the ground.5. Push down hard on the handlebar
several times to check for proper
fork operation.
6. Install the brake caliper by install-
ing the bolts.
TIPMake sure that there is enough space
between the brake pads before install-
ing the brake caliper onto the brake
disc.7. Install the speed sensor lead hold-
er by installing the screw
(WR125R only).
8. Tighten the wheel axle, front wheel
axle pinch bolts and brake caliper
bolts to their specified torques.
EAU25080
Rear wheel
EAUM2661
To remove the rear wheel
WARNING
EWA10821
To avoid injury, securely support the
vehicle so there is no danger of it
falling over.1. Loosen the locknut and drive chain
slack adjusting nut on each side of
the swingarm.
2. Loosen the axle nut.
1. Speed sensor
Tightening torques:
Wheel axle:
58 Nm (5.8 m·kgf, 42 ft·lbf)
Front wheel axle pinch bolt:
20 Nm (2.0 m·kgf, 14 ft·lbf)
Brake caliper bolt:
30 Nm (3.0 m·kgf, 22 ft·lbf)
1. Axle nut
2. Drive chain slack adjusting nut
3. Locknut
U22BE1E0.book Page 34 Wednesday, September 16, 2009 1:46 PM

PERIODIC MAINTENANCE AND ADJUSTMENT
6-35
6 3. Lift the rear wheel off the ground
according to the procedure on
page 6-32.
4. Remove the axle nut and the left
drive chain alignment plate.
5. Push the wheel forward, and then
remove the drive chain from the
rear sprocket.
TIP

If the drive chain is difficult to re-
move, remove the wheel axle first,
and then lift the wheel upward
enough to remove the drive chain
from the rear sprocket.


The drive chain does not need to
be disassembled in order to re-
move and install the rear wheel.
6. While supporting the brake caliper
and slightly lifting the wheel, pull
the wheel axle out together with
the right drive chain alignment
plate.
TIPA rubber mallet may be useful to tap the
wheel axle out.7. Remove the wheel. NOTICE: Do
not apply the brake after the
wheel has been removed to-
gether with the brake disc, oth-
erwise the brake pads will be
forced shut.
[ECA11071]
EAUM2652
To install the rear wheel
1. Install the drive chain onto the rear
sprocket.2. Install the wheel, the drive chain
alignment plates and the brake
caliper bracket by inserting the
wheel axle from the right-hand
side.
TIP

Install the drive chain alignment
plate with the “N” mark on the left
side, and be sure the mark is fac-
ing outward.


Make sure that the slot in the brake
caliper bracket is fit over the retain-
er on the swingarm.


Make sure that there is enough
space between the brake pads be-
fore installing the wheel.
1. Wheel axle
1. Retainer
2. Slot
U22BE1E0.book Page 35 Wednesday, September 16, 2009 1:46 PM

INDEX
AAir filter element and check hose,
replacing and cleaning ....................... 6-13
Auxiliary light bulb, replacing ................ 6-32BBattery .................................................. 6-27
Brake and clutch levers, checking and
lubricating ........................................... 6-24
Brake fluid, changing ............................ 6-21
Brake fluid level, checking .................... 6-20
Brake lever ............................................. 3-6
Brake pedal ............................................ 3-7
Brake pedal, checking and
lubricating ........................................... 6-25
Brake pedal free play, adjusting ........... 6-19CCables, checking and lubricating .......... 6-24
Care ........................................................ 7-1
Catalytic converters ................................ 3-9
Clutch lever............................................. 3-6
Clutch lever free play, adjusting ........... 6-18
Coolant ................................................. 6-12
Coolant temperature warning light.......... 3-2DDimmer switch ........................................ 3-5
Drive chain, cleaning and lubricating .... 6-23
Drive chain slack .................................. 6-22EEngine break-in ...................................... 5-3
Engine idling speed .............................. 6-14
Engine oil and oil filter element............... 6-9
Engine stop switch.................................. 3-5
Engine trouble warning light ................... 3-3
FFront and rear brake pads, checking .... 6-20
Front brake lever free play, checking .... 6-19
Front fork, checking...............................6-26
Fuel ......................................................... 3-8
Fuel consumption, tips for reducing ........ 5-3
Fuel tank cap........................................... 3-7
Fuses, replacing .................................... 6-29HHandlebar switches ................................. 3-5
Headlight bulb, replacing....................... 6-30
High beam indicator light......................... 3-2
Horn switch ............................................. 3-5IIdentification numbers ............................. 9-1
Ignition circuit cut-off system ................. 3-12
Indicator and warning lights .................... 3-2LLicense plate light bulb, replacing ......... 6-32MMain switch/steering lock ........................ 3-1
Maintenance and lubrication, periodic..... 6-3
Maintenance, emission control system ... 6-2
Model label .............................................. 9-1
Multi-function display...............................3-3NNeutral indicator light .............................. 3-2PPanels, removing and installing .............. 6-7
Parking ....................................................5-4
Part locations .......................................... 2-1
Pass switch ............................................. 3-5SSafety information ...................................1-1Seat ...................................................... 3-10
Shifting .................................................... 5-2
Shift pedal ............................................... 3-6
Shock absorber assembly, adjusting .... 3-10
Sidestand .............................................. 3-11
Sidestand, checking and lubricating ..... 6-25
Spark plug, checking .............................. 6-8
Specifications.......................................... 8-1
Starting the engine.................................. 5-1
Start switch ............................................. 3-5
Steering, checking ................................ 6-27
Storage ................................................... 7-3
Supporting the motorcycle .................... 6-32
Swingarm pivots, lubricating ................. 6-26
TTail/brake light bulb, replacing .............. 6-31
Throttle cable free play, adjusting ......... 6-14
Throttle grip and cable, checking and
lubricating ........................................... 6-24
Tires ...................................................... 6-15
Tool kit .................................................... 6-1
Troubleshooting .................................... 6-36
Troubleshooting charts ......................... 6-37
Turn signal indicator light ........................ 3-2
Turn signal light bulb, replacing ............ 6-31
Turn signal switch ................................... 3-5VValve clearance .................................... 6-15
Vehicle identification number .................. 9-1WWheel bearings, checking..................... 6-27
Wheel (front) ......................................... 6-33
Wheel (rear) .......................................... 6-34
Wheels .................................................. 6-17
U22BE1E0.book Page 1 Wednesday, September 16, 2009 1:46 PM