2005 YAMAHA DT125R lock

Recommended brake fluid:
DOT 4
Refill with the same type of brake
fluid. Mixing fluids may result in a
harmful chemical reaction and
lead to poor braking performan-
ce.
Be careful that water does not
enter the brake fluid reservoir
when refilling. Water will signifi-
cantly lower the boiling point of
the fluid and may result in vapor
lock.
Brake fluid may deteriorate pain-
ted surfaces or plastic parts.
Always clean up spilled fluid
immediately.
As the brake pads wear, it is nor-
mal for the brake fluid level to
gradually go down. However, if
the brake fluid level goes down
suddenly, have a Yamaha dealer
check the cause.
EAU22730
Changing the brake fluid
Have a Yamaha dealer change the
brake fluid at the intervals specified in
the NOTE after the periodic mainte-
nance and lubrication chart. In addi-
tion, have the oil seals of the master
cylinders and calipers as well as the
brake hoses replaced at the intervals
listed below or whenever they are
damaged or leaking.
Oil seals: Replace every two
years.
Brake hoses: Replace every four
years.
EAU22770
To check the drive chain slack
(a) Chain tension
1. Place the motorcycle on a level
surface and hold it in an upright
position.
NOTE:
When checking and adjusting the dri-
ve chain slack, the motorcycle should
be positioned straight up and there
should be no weight on it.
2. Shift the transmission into the
neutral position.
3. Move the rear wheel by pushing
the motorcycle to locate the tigh-
test portion of the drive chain,
and then measure the drive chain
slack as shown.
Drive chain slack:
45-55 mm (1,76-2,15 in)
4. If the drive chain slack is inco-
rrect, adjust it as follows.
6
PERIODIC MAINTENANCE AND MINOR REPAIR
6-19
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This model is equipped with quartz
bulb headlights. If a headlight bulb
burns out, replace it as follows.
1. Remove cowling A. (See page
6-5.)
2. Disconnect the headlight coupler,
and then remove the headlight
bulb cover.
3. Remove the headlight bulb hol-
der according to the following
illustration, and then remove the
defective bulb.
NOTE:
The removal procedure depends on
the type of bulb holder installed on
your vehicle.
EWA10790
s s
WARNING
Headlight bulbs get very hot. The-
refore, keep flammable products
away from a lit headlight bulb, and
do not touch the bulb until it has
cooled down.
4. Place a new bulb into position,
and then secure it with the bulb
holder.
ECA10660
CAUTION
Do not touch the glass part of the
headlight bulb to keep it free from
oil, otherwise the transparency of
the glass, the luminosity of the
bulb, and the bulb life will be adver-
sely affected. Thoroughly clean off
any dirt and fingerprints on the
headlight bulb using a cloth mois-
tened with alcohol or thinner.
5. Install the bulb cover, and then
connect the coupler.
6. Install the cowling.
7. Have a Yamaha dealer adjust the
headlight beam if necessary.
EAU24131
Replacing the tail/brake light
bulb
1. Screw (x2)
2. Lens
1. Remove the tail/brake light lens
by removing the screws.
2. Remove the defective bulb by
pushing it in and turning it coun-
terclockwise.
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
screws.6
PERIODIC MAINTENANCE AND MINOR REPAIR
6-25
21
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ECA10680
CAUTION
Do not overtighten the screws,
otherwise the lens may break.
EAU24201
Replacing a turn signal light
bulb
1. Screw
2. Lens
3. Bulb
1. Remove the turn signal light lens
by removing the screw.
2. Remove the defective bulb by
pushing it in and turning it coun-
terclockwise.
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.
ECA11190
CAUTION
Do not overtighten the screw,
otherwise the lens may break.
EAU24350
Supporting the motorcycle
Since this model is not equipped with
a centerstand, follow these precau-
tions when removing the front and
rear wheel or performing other main-
tenance requiring the motorcycle to
stand upright. Check that the
motorcycle is in a stable and level
position before starting any mainte-
nance. A strong wooden box can be
placed under the engine for added
stability.
To service the front wheel
1. Stabilize the rear of the motorcy-
cle by using a motorcycle stand
or, if an additional motorcycle
stand is not available, by placing
a jack under the frame in front of
the rear wheel.2. Raise the front wheel off the
ground by using a motorcycle
stand.
To service the rear wheel
Raise the rear wheel off the ground by
using a motorcycle stand or, if a
motorcycle stand is not available, by
placing 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
EAU24640
To remove the front wheel
1. Speedometer cable
2. Axle retainer nut (x4)
3. Wheel axle
6
PERIODIC MAINTENANCE AND MINOR REPAIR
6-26
1
3
2
31
2
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NOTE:
If coolant is not available, tap water can be temporarily used instead, provided that it is changed to the recommended
coolant as soon as possible.
PERIODIC MAINTENANCE AND MINOR REPAIR
6-31
6Wait until the
engine has cooled.Check the coolant level in the
reservoir and radiator.
The coolant level
is OK.
The coolant level is low.
Check the cooling system
for leakage.
Have a Yamaha dealer checkand repair the cooling system.
Add coolant. (See NOTE.)
Start the engine. If the engine overheats again, have a
Yamaha dealer check and repair the cooling system.
There is
leakage.
There is
no leakage.
Engine overheatingEWA10400
s s
WARNING
Do not remove the radiator cap when the engine and radiator are hot. Scalding hot fluid and steam may be
blown out under pressure, which could cause serious injury. Be sure to wait until the engine has cooled.
After removing the radiator cap retaining bolt, place a thick rag, like a towel, over the radiator cap, and then
slowly rotate the cap counterclockwise to the detent to allow any residual pressure to escape. When the his-
sing sound has stopped, press down on the cap while turning it counterclockwise, and then remove the cap.
1D0-F8199-E2.qxd 20/9/04 11:32 Página 62

AAdjusting the autolube pump ..................6-21
Adjusting the brake lever free play ..........6-16
Adjusting the brake pedal position and
free play .................................................6-17
Adjusting the clutch lever free play .........6-15
Adjusting the drive chain slack ................6-20
Adjusting the engine idling speed ...........6-12
Adjusting the rear brake light switch .......6-17
Ajusting the carburetor ............................6-11
Ajusting the throttle cable free play .........6-12
BBrake lever .................................................3-5
Brake pedal ................................................3-5
CCare............................................................7-1
Catalytic converter .....................................3-6
Changing the brake fluid..........................6-19
Checking and lubricating the brake and
shift pedals ............................................6-21
Checking and lubricating the breake and
clutch levers...........................................6-21
Checking and lubricating the cables .......6-21
Checking and lubricating the sidestand ..6-21
Checking and lubricating the throttle grip
and cable ...............................................6-21
Checking the drive chain slack ................6-19
Checking the front and rear brake
pads .......................................................6-18
Checking the front fork ............................6-22
Checking the spark plug ............................6-6
Checking the steering ..............................6-22
Checking the wheel bearings ..................6-23Cleaning the air filter element and check
hose .......................................................6-10
Clutch lever ................................................3-4
Controls and instruments ..........................2-3
Coolant.......................................................6-8
D2-stroke engine oil .....................................3-7
EEngine break-in ..........................................5-2
FFront wheel ..............................................6-26
Fuel cock....................................................3-7
Fuel tank cap .............................................3-5
H
Handlebar switches ...................................3-3
IIdentification numbers ...............................9-1
Ignition circuit cut-off system ..................3-10
Indicator and warning lights ......................3-2
LLeft view .....................................................2-1
Lubricating the drive chain ......................6-20
MMain switch/steering lock ..........................3-1
OOwner’s tool kit ..........................................6-1
PParking .......................................................5-3
Periodic maintenance and lubrication
chart .........................................................6-2
Pre-operation check list .............................4-2
RRear wheel ...............................................6-28Removing and installing cowlings and
panels ......................................................6-5
Replacing the fuse ...................................6-24
Replacing the headlight bulb ...................6-24
Replacing the tail/brake light bulb ...........6-25
Replacing the turn signal light bulb .........6-26
Right view ..................................................2-2
SSeat ............................................................3-8
Shift pedal ..................................................3-4
Shifting .......................................................5-2
Shock absorber..........................................3-9
Sidestand .................................................3-10
Specifications.............................................8-1
Speedometer unit ......................................3-3
Spoke wheels...........................................6-15
Starter (choke) lever ...................................3-8
Starting a cold engine ................................5-1
Starting a warm engine ..............................5-2
Storage.......................................................7-3
Supporting the motorcycle ......................6-26
TTires .........................................................6-13
Transmission oil .........................................6-7
Troubleshooting .......................................6-29
YYEIS handling precautions.........................3-9
YPVS ..........................................................3-9
INDEX
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