2017 YAMAHA YS125 light

Periodic maintenance an d a djustment
6-15
6 3. Lightly tap the air filter element to
remove most of the dust and dirt,
and then blow the remaining dirt
out with compressed air as
shown.
TIPReplace the air filter element if it is ex-
cessively worn or damaged.4. Insert the air filter element into theair filter case. NOTICE: Make
sure that the air filter element is
properly seate d in the air filter
case. The en gine shoul d never
b e operated without the air filter
element installe d, otherwise the piston(s) an
d/or cylin der(s) may
b ecome excessively worn.
[ECA10482]
5. Install the air filter case cover by
installing the screws.
6. Install the panel.
To clean the air filter check hose 1. Remove panel A. (See page 6-8.)
2. Check the hose shown for accu- mulated dirt, water or oil. 3. If dirt, water or oil is visible, re-
move the hose, clean it, and then
install it in its original position.
4. Install the panel.
1. Air filter element
1
1. Air filter element
1
1. Air filter check hose
1
UBT4E0E0.book Page 15 Thursday, November 17, 2016 10:55 AM

Periodic maintenance an d a djustment
6-21
6
EAU39815
A djustin g the brake pe dal free
playMeasure the brake pedal free play at
the brake pedal end as shown.
Periodically check the brake pedal free
play and, if necessary, adjust it as fol-
lows.
To increase the brake pedal free play,
turn the brake pedal free play adjusting
nut at the brake rod in direction (a). To
decrease the brake pedal free play,
turn the adjusting nut in direction (b).
WARNING
EWA10681
 After a djustin g the drive chain
slack or removin g an d installin g
the rear wheel, always check
the brake pe dal free play.
 If proper a djustment cannot b e
o btaine d as descri bed , have a
Yamaha dealer make this ad -
justment.
 After a djustin g the brake ped al
free play, check the operation of
the brake li ght.
EAU22274
Brake li ght switchesThe brake light, which is activated by
the brake pedal and brake lever,
should come on just before braking
takes effect. If necessary, adjust the
rear brake light switch as follows, but
the front brake light switch should be
adjusted by a Yamaha dealer.
Turn the rear brake light switch adjust-
ing nut while holding the rear brake
light switch in place. To make the
brake light come on earlier, turn the ad-
justing nut in direction (a). To make the
brake light come on later, turn the ad-
justing nut in direction (b).
1. Brake pedal free playBrake pe dal free play:
10.0–20.0 mm (0.39–0.79 in)
1
1. Brake pedal free play adjusting nut
1
(a)
(b)
1. Rear brake light switch
2. Rear brake light switch adjusting nut
1 2
(a)
(b)
UBT4E0E0.book Page 21 Thursday, November 17, 2016 10:55 AM

Periodic maintenance an d a djustment
6-33
6
EAU78872
Replacin g the hea dlig ht bul bThis model is equipped with a halogen
bulb headlight. If the headlight bulb
burns out, replace it as follows.NOTICE
ECA10651
Take care not to d amage the follow-
in g parts:
 Hea dlig ht bul b
Do not touch the g lass part of
the hea dlig ht bul b to keep it free
from oil, otherwise the transpar-
ency of the glass, the luminosity
of the b ulb, an d the bul b life will
b e ad versely affected . Thor-
ou ghly clean off any dirt an d fin-
g erprints on the head lig ht bul b
usin g a cloth moistened with al-
cohol or thinner.
 Hea dlig ht lens
Do not affix any type of tinted
film or stickers to the hea dlig ht
lens.
Do not use a hea dlig ht bul b of a
watta ge hi gher than specifie d.
1. Remove the headlight unit side
covers by removing the screw on
each side. 2. Remove the bolt on each side.
3. Loosen the headlight unit stay
bolt, and then tilt the headlight unit
forward.1. Do not touch the glass part of the bulb.
1. Headlight unit side cover
2. Screw
1
2
1. Headlight unit side cover
2. Screw
3. Headlight unit stay bolt
1. Bolt
213
1
UBT4E0E0.book Page 33 Thursday, November 17, 2016 10:55 AM

Periodic maintenance an d a djustment
6-34
6
4. Disconnect the headlight coupler,
then remove the headlight bulb
cover.
5. Unhook the headlight bulb holder, then remove the burnt-out bulb. 6. Place a new headlight bulb into
position, then secure it with the
bulb holder.
7. Install the headlight bulb cover, then connect the headlight cou-
pler.
8. Place the headlight unit in its orig- inal position, and then tighten the
headlight unit stay bolt to the
specified torque.
9. Install the bolt on each side.
10. Place the headlight unit side cov- ers in their original position, and
then install the screw on each
side.
11. Have a Yamaha dealer adjust the headlight beam if necessary.
EAU45226
Replacin g the auxiliary li ght
b ul b If the auxiliary light bulb burns out, re-
place it as follows.
1. Remove the headlight unit. (See page 6-33.)
2. Remove the auxiliary light bulb socket (together with the bulb) by
pulling it out.
3. Remove the burnt-out bulb by pulling it out.
4. Insert a new bulb into the socket.
5. Install the socket (together with the bulb) by pushing it in.
6. Install the headlight unit.
1. Headlight coupler
2. Headlight bulb holder
1. Headlight bulb holder
2. Headlight bulb
1 21
2
Ti
ghtenin g torque:
Headlight unit stay bolt: 7 N·m (0.7 kgf·m, 5.1 lb·ft)
1. Auxiliary light bulb
2. Auxiliary light bulb socket
1
2
UBT4E0E0.book Page 34 Thursday, November 17, 2016 10:55 AM

Periodic maintenance an d a djustment
6-35
6
EAU78920
Replacin g the brake/tail li ght
b ul b1. Remove the seat. (See page 3-11.)
2. Remove the brake/tail light bulb
socket (together with the bulb) by
turning it counterclockwise.
3. Remove the burnt-out bulb by pushing it in and turning it coun-
terclockwise. 4. Insert a new bulb into the socket,
push it in, and then turn it clock-
wise until it stops.
5. Install the socket (together with the bulb) by turning it clockwise.
6. Install the seat.
EAU24205
Replacin g a turn si gnal li ght
b ul b1. Remove the turn signal light lens
by removing the screw.
2. Remove the burnt-out bulb by pushing it in and turning it coun-
terclockwise.
1. Brake/tail light bulb socket
1
1. Brake/tail light bulb1
1. Turn signal light lens
2. Screw
1
2
UBT4E0E0.book Page 35 Thursday, November 17, 2016 10:55 AM

Periodic maintenance an d a djustment
6-36
6
3. Insert a new bulb into the socket,
push it in, and then turn it clock-
wise until it stops.
4. Install the lens by installing the screw. NOTICE: Do not over-
ti g hten the screw, otherwise the
lens may break.
[ECA11192] EAU78970
Replacin
g the license plate
lig ht bul b1. Remove the license plate light unit
by removing the nuts.
2. Remove the license plate light bulb socket (together with the
bulb) by pulling it out.
3. Remove the burnt-out bulb by pulling it out.
4. Insert a new bulb into the socket.
5. Install the socket (together with the bulb) by pushing it in.
6. Install the license plate light unit by installing the nuts.
EAU24361
Front wheel
EAUW3361
To remove the front wheel
WARNING
EWA10822
To avoi d injury, securely support the
vehicle so there is no dan ger of it
fallin g over.1. Take the vehicle off the center-
stand so that the front wheel is on
the ground, and then put the side-
stand down.
2. Loosen the front wheel axle nut.
1. Turn signal light bulb
1
1. License plate light unit
2. License plate light bulb
3. License plate light bulb socket
4. Nut
1
32
4
4
1. Axle nut
1
UBT4E0E0.book Page 36 Thursday, November 17, 2016 10:55 AM

Motorcycle care and stora ge
7-3
7
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
EWA11132
Contaminants on the b rakes 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
d iscs an d b rake linin gs with a
re gular brake disc cleaner or
acetone, an d wash the tires with
warm water an d a mil d d eter-
g ent. Before rid ing at hi gher
spee ds, test the motorcycle’s
b rakin g performance an d cor-
nerin g b ehavior.
NOTICE
ECA10801
 Apply spray oil an d wax spar-
in gly an d make sure to wipe off
any excess.
 Never apply oil or wax to any
rubber an d plastic parts, b ut
treat them with a suita ble care
prod uct.
 Avoi d using abrasive polishin g
compoun ds as they will wear
away the paint.TIP Consult a Yamaha dealer for ad-
vice on what products to use.
 Washing, rainy weather or humid
climates can cause the headlight
lens to fog. Turning the headlight
on for a short period of time will
help remove the moisture from the
lens.
EAU43204
Stora geShort-term
Always store your motorcycle in a cool,
dry place and, if necessary, protect it
against dust with a porous cover. Be
sure the engine and the exhaust sys-
tem are cool before covering the mo-
torcycle.NOTICE
ECA10811
 Storin g the motorcycle in a
poorly ventilated room or cover-
in g it with a tarp, while it is still
wet, will allow water an d humi d-
ity to seep in an d cause rust.
 To prevent corrosion, avoi d
d amp cellars, stab les (because
of the presence of ammonia)
an d areas where stron g chemi-
cals are stored .Long-term
Before storing your motorcycle for sev-
eral months: 1. Follow all the instructions in the “Care” section of this chapter.
UBT4E0E0.book Page 3 Thursday, November 17, 2016 10:55 AM

Specifications
8-3
8
Voltage, capacity:12 V, 4.0 Ah (10 HR)Headlight:Bulb type:
Halogen bulbBulb wattage:Headlight:HS1, 35.0 W/35.0 W
Front turn signal light:
10.0 W
Rear turn signal light: 10.0 W
Auxiliary light: 3.0 W
Meter lighting:
LED
Neutral indicator light: LED
High beam indicator light: LED
Turn signal indicator light:
LED
Engine trouble warning light: LED
ECO indicator light: LEDFuse(s):Main fuse:15.0 A
UBT4E0E0.book Page 3 Wednesday, December 21, 2016 11:07 AM