brake YAMAHA YBR125 2007 User Guide

1. Locknut
2. Adjusting nut
3. Free playClutch lever free play
adjustmentThe clutch lever free play should be
adjusted to 10 ~ 15 mm. If the free
play is incorrect, adjust as follows.
1 . Loosen the locknut.
2. Turn the adjusting nut in direction
to increase free play or in
direction to decrease free
play.
3. Tighten the locknut.è
çIf proper adjustment cannot be
obtained or the clutch does not work
correctly, ask a dealer to
inspect the internal clutch
mechanism.YAMAHA
1. Adjusting nut
2. Free playFront brake adjustmentThe front brake lever free play should
be adjusted to 10 ~ 15 mm.
1. Turn the adjusting nut in direction
to increase free play and
direction to decrease free play. ç
è
When it is impossible to make the
proper adjustment, ask a YAMAHA
dealer.
PERIODIC MAINTENANCE AND MINOR REPAIR
6-16
NOTE :
WARNING

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

1. Wear limit line
2. Wear indicatorChecking the brake shoesA wear indicator is provided on each
brake. This indicator allows
inspection of shoe wear without
disassembling the brake. Apply the
brake and inspect the position of the
indicator. If the indicator reaches to
the wear limit line, ask a YAMAHA
dealer to replace the shoes.
1. Wear limit line
2. Wear indicator1. Free play
Drive chain slack checkSpin the wheel several times and
find the tightest position of the
chain. Check and/or adjust the
chain slack while it's in this tightest
position.
Inspect the drive chain when the
Motorcycle is on the centerstand.
Check the slack at the position
shown in the illustration. Normal
slack is approximately 20 ~ 30 mm.
If the slack exceeds 30 mm, adjust.
PERIODIC MAINTENANCE AND MINOR REPAIR
6-18
NOTE :

1. Chain jointIf the chain is disassembled, be sure
the chain lock is placed in the
correct direction when installing.
1. Adjusting nut
2. Cotter pin
3. Axle nutDrive chain slack adjust-
ment1. Loosen the rear brake pedal
free play adjusting nut.
2. Remove the cotter pin from
the axle nut.
3. Loosen the axle nut.
1. Locknut
2. Adjusting hex screw4. Loosen the chain adjusting
locknuts on each chain puller. To
tighten the chain, turn the chain
adjusting hex screw in direction b
to loosen the chain, turn the chain
adjusting hex screw in direction a
and push the wheel forward. Turn
each chain adjusting hex screw
exactly the same amount to
maintain correct axle alignment.
There are marks on each chain
puller. Use these marks to align
the rear wheel.
PERIODIC MAINTENANCE AND MINOR REPAIR
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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

Brake and shift pedal
lubricationLubricate the pivoting parts.
Recommended lubricant:
20W40 Type SG
Brake and Clutch Lever
GreasingGrease the pivoting parts.
MULTIPURPOSE Recommended Grease :
Center and sidestand
lubricationLubricate the pivoting and mating
joints.
Check to see that the center and
sidestand move up and down
smoothly.
Recommended lubricant:
If the center and/or sidestand does
not move smoothly, consult
aYAMAHA dealer.20W40 Type SG
PERIODIC MAINTENANCE AND MINOR REPAIR
6-22
WARNING

CAUTION :
Front fork inspectionSecurely support the Motorcycle
so there is no danger of it falling
over.
1. Visual check
Check for scratches or damage
on the inner tube and traces of oil
leakage from the front fork.2. Operation check
Place the Motorcycle on a level
place.
a. Hold the Motorcycle in an
upright position and apply the
front brake.
b. Push down hard on the
handlebars several times and
check if the fork rebounds
smoothly.
If any damage or unsmooth
movement is found with the front
fork, consult a YAMAHA dealer.
Steering inspectionPeriodically inspect the condition of
the steering. Worn out or loose
steering bearings may be danger-
ous. Place a stand under the engine
to raise the front wheel off the
ground. Hold the lower end of the
front forks and try to move them
forward and backward. If any free
play can be felt, ask a YAMAHA
dealer to inspect and adjust the
steering. Inspection is easier if the
front wheel is removed.
PERIODIC MAINTENANCE AND MINOR REPAIR
6-23
WARNING

1. Brake cable adjusting nut1. Place the Motorcycle on the
centerstand.
2. Fully loosen the brake cable
adjusting bolt at the handlebar
lever holder.
3 Fully loosen the brake cable
adjusting nut at the wheel hub and
remove the cable from the brake
cam lever.
1. Clip
2. Speedometer cable4. Remove the speedometer cable
from the front wheel side. First
remove the clip and then pull the
cable out.
1. Cotter pin
2. Axle nut5. Remove the cotter pin and axle
nut.
6. Remove the wheel axle. Make
sure the Motorcycle is properly
supported.
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1. StopperFront wheel installationWhen installing the front wheel,
reverse the removal procedure.
Pay attention to the following points:
1. Make sure the slot in the brake
shoe plate fits over the stopper on
the front fork outer tube.
2. Make sure the axle nut is properly
torqued and a new cotter pin is
installed.Always use a new cotter pin.
Axle nut torque:
33 ft-lb (4.55 m-kg)
3. Adjust the free play in the brake
lever.PERIODIC MAINTENANCE AND MINOR REPAIR
6-30
WARNING
Rear wheel removalIt is advisable to service the
wheel by a YAMAHA dealer.
Securely support the
Motorcycle so there is no
danger of it falling over.
WARNING

1. Nut
2. Cotter pin
3. Tension bar1. Place the Motorcycle on the
centerstand.
2. Remove the cotter pin and nut.
Then remove the tension bar
from the brake shoe plate.
1. Axle nut
2. Cotter pin
3. Brake rod
4. Brake adjusting nut3. Remove the brake adjusting nut
and brake rod from the brake cam
lever.
4. Remove the axle nut cotter pin
and the axle nut.
1. Rear axle5. Pull out the rear axle.
6. Remove the wheel assembly.
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ALWAYS USE YAMAHA GENUINE SPARE PARTS