2021 YAMAHA YZF-R125 brake

Periodic maintenance an d a djustment
6-21
6
EAUT1223
Checkin g the front b rake lever
free playMeasure the front brake lever free play
as shown.
Periodically check the brake lever free
play and, if necessary, have a Yamaha
dealer check the brake system.
WARNING
EWA10642
An incorrect brake lever free play in-
d icates a hazar dous con dition in the
b rake system. Do not operate the vehicle until the
brake system has
b een checked or repaired by a
Yamaha dealer.
EAUM1355
A djustin g the brake pe dal free
playMeasure the brake pedal free play as
shown.
Periodically check the brake pedal free
play and, if necessary, have a Yamaha
dealer adjust it.
WARNING
EWAM1031
An incorrect brake ped al free play
in dicates a hazar dous con dition in
the brake system. Do not operate
1. Brake lever free playFront brake lever free play:
2.0–5.0 mm (0.08–0.20 in)ZAUM1599
1
1. Brake pedal free play
Brake pe dal free play:
3.5–4.5 mm (0.14–0.18 in)ZAUM1600
1
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Periodic maintenance an d a djustment
6-22
6 the motorcycle until the
brake sys-
tem has b een checked or repaired
b y a Yamaha dealer.
EAU36505
Brake li ght switchesThe brake light should come on just
before braking takes effect. The brake
light is activated by switches connect-
ed to the brake lever and brake pedal.
Since the brake light switches are
components of the anti-lock brake sys-
tem, they should only be serviced by a
Yamaha dealer.
EAU22393
Checkin g the front an d rear
b rake pa dsThe front and rear brake pads must be
checked for wear at the intervals spec-
ified in the periodic maintenance and
lubrication chart.
EAU22421
Front brake pa ds
Each front brake pad is provided with a
wear indicator groove, which allows
you to check the brake pad wear with-
out having to disassemble the brake.
To check the brake pad wear, check
the wear indicator groove. If a brake
pad has worn to the point that the wear1. Wear indicator grooveZAUM1466
1
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Periodic maintenance an d a djustment
6-23
6
indicator groove has almost disap-
peared, have a Yamaha dealer replace
the brake pads as a set.
EAU36721
Rear
brake pa ds
Each rear brake pad is provided with
wear indicator grooves, which allow
you to check the brake pad wear with-
out having to disassemble 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 grooves have almost disap-
peared, have a Yamaha dealer replace
the brake pads as a set.
EAU40262
Checkin g the brake flui d levelBefore riding, check that the brake fluid
is above the minimum level mark.
Check the brake fluid level with the top
of the reservoir level. Replenish the
brake fluid if necessary.
Front brake Rear
brake
WARNING
EWA16011
Improper maintenance can result in
loss of b raking a bility. O bserve
these precautions:  Insufficient brake flui d may al-
low air to enter the b rake sys-
tem, re ducing brakin g
performance.
 Clean the filler cap before re-
moving . Use only DOT 4 b rake
flui d from a seale d container.
1. Wear indicator grooveZAUM1601
1
1
1. Minimum level mark
1
ZAUM1057
1. Minimum level mark
Specified b rake flui d:
DOT 4ZAUM1603
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Periodic maintenance an d a djustment
6-24
6 
Use only the specified b rake flu-
i d ; otherwise, the ru bber seals
may deteriorate, causin g leak-
a g e.
 Refill with the same type of
brake flui d. A ddin g a brake flui d
other than DOT 4 may result in a
harmful chemical reaction.
 Be careful that water or d ust
d oes not enter the brake flui d
reservoir when refillin g. Water
will si gnificantly lower the boil-
in g point of the flui d an d may re-
sult in vapor lock, an d d irt may
clo g the ABS hy draulic unit
valves.
NOTICE
ECA17641
Brake flui d may damag e painted
surfaces or plastic parts. Always
clean up spille d flui d imme diately.As the brake pads wear, it is normal for
the brake fluid level to gradually go
down. A low brake fluid level may indi-
cate worn brake pads and/or brake
system leakage; therefore, be sure to
check the brake pads for wear and the
brake system for leakage. If the brake fluid level goes down suddenly, have a
Yamaha dealer check the cause before further riding.
EAU22734
Chan gin g the brake flui dHave a Yamaha dealer change the
brake fluid every 2 years. In addition,
have the seals of the master cylinders
and brake calipers, as well as the brake
hoses replaced at the intervals listed
below or sooner if they are damaged or
leaking.
 Brake seals: every 2 years
 Brake hoses: every 4 years
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Periodic maintenance an d a djustment
6-27
6
EAU23098
Checkin g an d lu bricatin g the
ca blesThe operation of all control cables and
the condition of the cables should be
checked before each ride, and the ca-
bles and cable ends should be lubri-
cated if necessary. If a cable is
damaged or does not move smoothly,
have a Yamaha dealer check or re-
place it. WARNING! Dama ge to the
outer housin g of cab les may result
in internal rustin g an d cause inter-
ference with ca ble movement. Re-
place damag ed cab les as soon as
possi ble to prevent unsafe con di-
tions.
[EWA10712] EAU23115
Checkin
g an d lu bricatin g the
throttle grip an d ca bleThe operation of the throttle grip
should be checked before each ride. In
addition, the cable should be lubricat-
ed by a Yamaha dealer at the intervals
specified in the periodic maintenance
chart.
The throttle cable is equipped with a
rubber cover. Make sure that the cover
is securely installed. Even though the
cover is installed correctly, it does not
completely protect the cable from wa-
ter entry. Therefore, use care not to
pour water directly onto the cover or
cable when washing the vehicle. If the
cable or cover becomes dirty, wipe
clean with a moist cloth.
EAU44276
Checkin g an d lu bricatin g the
b rake an d shift pe dalsThe operation of the brake and shift
pedals should be checked before each
ride, and the pedal pivots should be lu-
bricated if necessary.
Brake pe dal
Shift pe dal
Recommen ded lu bricant:
Yamaha cable lubricant or other
suitable cable lubricant
ZAUM1606ZAUM1607
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Periodic maintenance an d a djustment
6-28
6
EAU23144
Checkin g an d lu bricatin g the
b rake an d clutch leversThe operation of the brake and clutch
levers should be checked before each
ride, and the lever pivots should be lu-
bricated if necessary.
Brake lever
Clutch lever
Recommen ded lu bricant:
Lithium-soap-based grease
ZAUM1608
Recommen ded lu bricants:
Brake lever:
Silicone grease
Clutch lever:
Lithium-soap-based grease
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Periodic maintenance an d a djustment
6-29
6
EAU23203
Checkin g an d lu bricatin g the
si destan dThe operation of the sidestand should
be checked before each ride, and the
sidestand pivot and metal-to-metal
contact surfaces should be lubricated
if necessary.
WARNING
EWA10732
If the sid estand d oes not move up
an d d own smoothly, have a Yamaha
d ealer check or repair it. Otherwise,
the si destan d coul d contact the
g roun d an d d istract the operator, re-
sultin g in a possi ble loss of control.
EAU23252
Lu bricatin g the rear suspen-
sionThe pivoting points of the rear suspen-
sion must be lubricated by a Yamaha
dealer at the intervals specified in the
periodic maintenance and lubrication
chart.
EAU23273
Checkin g the front forkThe condition and operation of the
front fork must be checked as follows
at the intervals specified in the periodic
maintenance and lubrication chart.
To check the con dition
Check the inner tubes for scratches,
damage and excessive oil leakage.
To check the operation 1. Place the vehicle on a level sur- face and hold it in an upright posi-
tion. WARNING! To avoi d injury,
securely support the vehicle so
there is no dan ger of it fallin g
over.
[EWA10752]
2. While applying the front brake, push down hard on the handle-
bars several times to check if the
front fork compresses and re-
bounds smoothly.
Recommen ded lu bricant:
Lithium-soap-based greaseZAUM1620
Recommen ded lu bricant:
Lithium-soap-based grease
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Periodic maintenance an d a djustment
6-33
6
EAUN2261
Vehicle li ghtsThis model is equipped with LED lights
for headlights, auxiliary lights and
brake/tail light. If a light does not come
on, check the fuse and then have a
Yamaha dealer check the vehicle.NOTICE
ECA16581
Do not affix any type of tinte d film or
stickers to the head lig ht lens.
EAU24182
Tail/b rake li ghtThis model is equipped with an LED-
type tail/brake light.
If the tail/brake light does not come on,
have a Yamaha dealer check it.
EAU62590
Replacin g a turn sig nal light
b ul b1. Remove the turn signal light lens
by removing the screw.
2. Remove the turn signal light bulb socket (together with the bulb) by
turning it counterclockwise.
1. Auxiliary light
2. Headlight (high beam)
3. Headlight (low beam)ZAUM1622
231
1. Screw
1
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