2010 YAMAHA WR 125R brake

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

MOTORCYCLE CARE AND STORAGE
7-1
7
EAU26004
Care While the open design of a motorcycle
reveals the attractiveness of the tech-
nology, it also makes it more vulnera-
ble. Rust and corrosion can develop
even if high-quality components are
used. A rusty exhaust pipe may go un-
noticed on a car, however, it detracts
from the overall appearance of a motor-
cycle. Frequent and proper care does
not only comply with the terms of the
warranty, but it will also keep your mo-
torcycle looking good, extend its life
and optimize its performance.
Before cleaning
1. Cover the muffler outlet with a
plastic bag after the engine has
cooled down.
2. Make sure that all caps and covers
as well as all electrical couplers
and connectors, including the
spark plug cap, are tightly in-
stalled.
3. Remove extremely stubborn dirt,
like oil burnt onto the crankcase,
with a degreasing agent and a
brush, but never apply such prod-ucts onto seals, gaskets, sprock-
ets, the drive chain and wheel
axles. Always rinse the dirt and de-
greaser off with water.
Cleaning
NOTICE
ECA10772


Avoid using strong acidic wheel
cleaners, especially on spoked
wheels. If such products are
used on hard-to-remove dirt, do
not leave the cleaner on the af-
fected area any longer than in-
structed. Also, thoroughly rinse
the area off with water, immedi-
ately dry it, and then apply a cor-
rosion protection spray.


Improper cleaning can damage
plastic parts (such as cowlings,
panels, windshields, headlight
lenses, meter lenses, etc.) and
the mufflers. Use only a soft,
clean cloth or sponge with wa-
ter to clean plastic. However, if
the plastic parts cannot be thor-
oughly cleaned with water, di-
luted mild detergent with water
may be used. Be sure to rinseoff any detergent residue using
plenty of water, as it is harmful
to plastic parts.


Do not use any harsh chemical
products on plastic parts. Be
sure to avoid using cloths or
sponges which have been in
contact with strong or abrasive
cleaning products, solvent or
thinner, fuel (gasoline), rust re-
movers or inhibitors, brake flu-
id, antifreeze or electrolyte.


Do not use high-pressure wash-
ers or steam-jet cleaners since
they cause water seepage and
deterioration in the following ar-
eas: seals (of wheel and swing-
arm bearings, fork and brakes),
electric components (couplers,
connectors, instruments,
switches and lights), breather
hoses and vents.


For motorcycles equipped with
a windshield: Do not use strong
cleaners or hard sponges as
they will cause dulling or
scratching. Some cleaning com-
pounds for plastic may leave
scratches on the windshield.
U22BE1E0.book Page 1 Wednesday, September 16, 2009 1:46 PM

MOTORCYCLE CARE AND STORAGE
7-2
7Test the product on a small hid-
den part of the windshield to
make sure that it does not leave
any marks. If the windshield is
scratched, use a quality plastic
polishing compound after
washing.
After normal useRemove dirt with warm water, a mild
detergent, and a soft, clean sponge,
and then rinse thoroughly with clean
water. Use a toothbrush or bottlebrush
for hard-to-reach areas. Stubborn dirt
and insects will come off more easily if
the area is covered with a wet cloth for
a few minutes before cleaning.
After riding in the rain, near the sea oron salt-sprayed roadsSince sea salt or salt sprayed on roads
during winter are extremely corrosive in
combination with water, carry out the
following steps after each ride in the
rain, near the sea or on salt-sprayed
roads.
TIPSalt sprayed on roads in the winter may
remain well into spring.1. Clean the motorcycle with cold wa-
ter and a mild detergent, after the
engine has cooled down.
NOTICE: Do not use warm water
since it increases the corrosive
action of the salt.
[ECA10791]
2. Apply a corrosion protection spray
on all metal, including chrome- and
nickel-plated, surfaces to prevent
corrosion.
After cleaning
1. Dry the motorcycle with a chamois
or an absorbing cloth.
2. Immediately dry the drive chain
and lubricate it to prevent it from
rusting.
3. Use a chrome polish to shine
chrome, aluminum and stainless-
steel parts, including the exhaust
system. (Even the thermally in-
duced discoloring of stainless-
steel exhaust systems can be re-
moved through polishing.)4. To prevent corrosion, it is recom-
mended to apply a corrosion pro-
tection spray on all metal,
including chrome- and nickel-plat-
ed, surfaces.
5. Use spray oil as a universal clean-
er to remove any remaining dirt.
6. Touch up minor paint damage
caused by stones, etc.
7. Wax all painted surfaces.
8. Let the motorcycle dry completely
before storing or covering it.
WARNING
EWA11131
Contaminants on the brakes or tires
can cause loss of control.

Make sure that there is no oil or
wax on the brakes or tires.


If necessary, clean the brake
discs and brake linings with a
regular brake disc cleaner or ac-
etone, and wash the tires with
warm water and a mild deter-
gent. Before riding at higher
speeds, test the motorcycle’s
braking performance and cor-
nering behavior.
U22BE1E0.book Page 2 Wednesday, September 16, 2009 1:46 PM

SPECIFICATIONS
8-2
8
Operation:
Left foot operation
Gear ratio:
1st:
34/12 (2.833)
2nd:
30/16 (1.875)
3rd:
30/22 (1.364)
4th:
24/21 (1.143)
5th:
22/23 (0.957)
6th:
21/25 (0.840)Chassis:Frame type:
Double cradle
Caster angle:
WR125R 27.00 °
WR125X 25.50 °
Trail:
WR125R 107.0 mm (4.21 in)
WR125X 78.5 mm (3.09 in)Front tire:Type:
With tube
Size:
WR125R 80/90-21M/C 48P
WR125X 110/70-17M/C 54H
Manufacturer/model:
WR125R PIRELLI / MT90 SCORPION
WR125X PIRELLI / SPORT DEMONManufacturer/model:
WR125R MICHELIN / SIRAC
Rear tire:Type:
With tube
Size:
WR125R 110/80-18 M/C 58P
WR125X 140/70-17 M/C 66H
Manufacturer/model:
WR125R PIRELLI / MT90 SCORPION
WR125X PIRELLI / SPORT DEMON
Manufacturer/model:
WR125R MICHELIN / SIRACLoading:Maximum load:
185 kg (408 lb)
(Total weight of rider, passenger, cargo and
accessories)Tire air pressure (measured on cold
tires):Loading condition:
0–90 kg (0–198 lb)
Front:
180 kPa (1.80 kgf/cm², 26 psi)
Rear:
200 kPa (2.00 kgf/cm², 29 psi)
Loading condition:
90–185 kg (198–408 lb)
Front:
200 kPa (2.00 kgf/cm², 29 psi)
Rear:
225 kPa (2.25 kgf/cm², 33 psi)
Front wheel:Wheel type:
Spoke wheel
Rim size:
WR125R 21x1.6
WR125X 17x3Rear wheel:Wheel type:
Spoke wheel
Rim size:
WR125R 18 x 2.15
WR125X 17 x MT3.5Front brake:Type:
Single disc brake
Operation:
Right hand operation
Recommended fluid:
DOT 4Rear brake:Type:
Single disc brake
Operation:
Right foot operation
Recommended fluid:
DOT 4Front suspension:Type:
Telescopic fork
Spring/shock absorber type:
Coil spring/oil damper
Wheel travel:
WR125R 240.0 mm (9.45 in)
WR125X 210.0 mm (8.27 in)
U22BE1E0.book Page 2 Wednesday, September 16, 2009 1:46 PM

SPECIFICATIONS
8-3
8
Rear suspension:Type:
Swingarm (monocross)
Spring/shock absorber type:
WR125R Coil spring/gas-oil damper
WR125X Coil spring/oil damper
Wheel travel:
230.0 mm (9.06 in)Electrical system:Ignition system:
TCI (digital)
Charging system:
AC magnetoBattery:Model:
12N5.5-4A
Voltage, capacity:
12 V, 5.5 AhHeadlight:Bulb type:
Halogen bulbBulb voltage, wattage × quantity:Headlight:
12 V, 35 W/35 W × 1
Tail/brake light:
12 V, 21.0 W/5.0 W × 1
Front turn signal light:
12 V, 10.0 W × 2
Rear turn signal light:
12 V, 10.0 W × 2
Auxiliary light:
12 V, 5.0 W × 1
License plate light:
12 V, 5.0 W × 1Meter lighting:
LED
Neutral indicator light:
LED
High beam indicator light:
LED
Turn signal indicator light:
LED
Coolant temperature warning light:
LED
Engine trouble warning light:
LED
Fuses:Main fuse:
20.0 A
Headlight fuse:
15.0 A
Signaling system fuse:
7.5 A
Ignition fuse:
7.5 A
Radiator fan fuse:
5.0 A
U22BE1E0.book Page 3 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