2006 YAMAHA DT125R coolant level

EAU11002
Indicator and warning lights
1. Turn signal indicator light “b”
2. Dimmer indicator light “j”
3. Neutral indicator light “N”
4. Oil level warning light “z”
EAU11030
Turn signal indicator lights “c” and
“d”
The corresponding indicator light flas-
hes when the turn signal switch is
pushed to the left or right.
EAU11070
Neutral indicator light “N”
This indicator light comes on when
the transmission is in the neutral posi-
tion.
EAU11080
High beam indicator light “j”
This indicator light comes on when
the high beam of the headlight is swit-
ched on.
EAU11180
Oil level warning light “z”
This warning light comes on when the
key is in the “ON” position or when
the oil level in the 2-stroke engine oil
tank is low during operation. If the
warning light comes on during opera-
tion, stop immediately and fill the oil
tank with Yamalube 2 or equivalent 2-
stroke engine oil of either JASO grade
“FC” or ISO grades “EG-C” or “EG-
D”. The warning light should go off
after the 2-stroke engine oil tank has
been refilled.
NOTE:
If the warning light does not come on
when the key is in the “ON” position
or does not go off after the 2-stroke
engine oil tank has been refilled, have
a Yamaha dealer check the electrical
circuit.
ECA10010
CAUTION
Do not operate the vehicle until you
know that the engine oil level is suf-
ficient.
EAU11430
Coolant temperature warning light
“y”
This warning light comes on when the
engine overheats. When this occurs,
stop the engine immediately and
allow the engine to cool.
ECA10020
CAUTION
Do not operate the engine if it is
overheated.
0km/h406080
100
120
130 20
y
00001
5
0008
bj
zN
3
INSTRUMENT AND CONTROL FUNCTIONS
3-2
1
234
1D0-F8199-E2.qxd 20/9/04 11:32 Página 16

PRE-OPERATION CHECKS
4-2
4
EAU15603
Pre-operation check list
ITEM CHECKS PAGE
• Check fuel level in fuel tank.
Fuel• Refuel if necessary.3-6
• Check fuel line for leakage.
• Check oil level in oil tank.
2-stroke engine oil• If necessary, add recommended oil to specified level. 3-7
• Check vehicle for oil leakage.
Transmission oil• Check oil level in transmission case.
6-7
• If necessary, add recommended oil to specified level.
• Check coolant level in reservoir.
Coolant• If necessary, add recommended coolant to specified level. 6-8
• Check cooling system for leakage.
• Check operation.
• If soft or spongy, have Yamaha dealer bleed hydraulic system.
Front brake• Check brake pads for wear.
6-16/6-18
• Replace if necessary.
• Check fluid level in reservoir.
• If necessary, add recommended brake fluid to specified level.
• Check hydraulic system for leakage.
• Check operation.
• If soft or spongy, have Yamaha dealer bleed hydraulic system.
Rear brake• Check brake pads for wear.
6-16/6-18
• Replace if necessary.
• Check fluid level in reservoir.
• If necessary, add recommended brake fluid to specified level.
• Check hydraulic system for leakage.
• Check operation.
Clutch• Lubricate cable if necessary.
6-15
• Check lever free play.
• Adjust if necessary.
• Make sure that operation is smooth.
Throttle grip• Check cable free play.
6-12/6-21
• If necessary, have Yamaha dealer adjust cable free play and lubricate
cable andgrip housing.
1D0-F8199-E2.qxd 20/9/04 11:32 Página 25

ODOMETER READING (x 1000 Km) ANNUAL
CHECK
NoITEM CHECK OR MAINTENANCE JOB 1 6 12 18 24
22Transmission oil• Check oil level.√√ √ √√ √• Change.√√
23 *Cooling system• Check coolant level and vehicle for coolant leakage.√√√√ √• Change. Every 3 years
24 *Front and rear
• Check operation.√√ √ √√ √
brake switches
25Moving parts and cables• Lubricate.√√√√ √
Throttle grip • Check operation and free play.
26 * •Adjust the throttle cable free play if necessary.√√√√ √
housing and cable
• Lubricate the throttle grip housing and cable.
27 *Muffler and exhaust pipe• Check the screw clamp for looseness.√√ √ √√
28 *Lights, signals • Check operation.
and switches• Adjust headlight beam.√√ √ √√ √
PERIODIC MAINTENANCE AND MINOR REPAIR
6-4
6
EAU18670
NOTE:
The air filter needs more frequent service if you are riding in unusually wet or dusty areas.
Hydraulic brake service
• Regularly check and, if necessary, correct the brake fluid level.
• Every two years replace the internal components of the brake master cylinders and calipers, and change the bra-
ke fluid.
• Replace the brake hoses every four years and if cracked or damaged.
1D0-F8199-E2.qxd 20/9/04 11:32 Página 35

1. Start the engine, warm it up for
several minutes, and then turn it
off.
2. Place an oil pan under the trans-
mission to collect the used oil.
3. Remove the oil filler cap and
drain bolt to drain the oil from the
transmission.
4. Install the transmission oil drain
bolt, and then tighten it to the
specified torque.
Tightening torque:
Transmission oil drain bolt:
15 Nm (1,5 m•kgf)
5. Add the specified amount of the
recommended transmission oil,
and then install and tighten the oil
filler cap.
Recommended transmission oil:
See page 8-1.
Oil change quantity:
0,8 L (0,85 US qt)
ECA10450
CAUTION
In order to prevent clutch slip-
page (since the transmission
oil also lubricates the clutch),
do not mix any chemical additi-
ves with the oil.
Make sure that no foreign
material enters the transmis-
sion.
6. Start the engine, and then let it
idle for several minutes while
checking the transmission for oil
leakage. If oil is leaking, imme-
diately turn off the engine and
check for the cause.
EAU20070
Coolant
The coolant level should be checked
before each ride. In addition, the coo-
lant must be changed at the intervals
specified in the periodic maintenance
and lubrication chart.
EAU20170
To check the coolant level
1. Place the vehicle on a level surfa-
ce and hold it in an upright posi-
tion.
NOTE:
The coolant level must be chec-
ked on a cold engine since the
level varies with engine tempera-
ture.
Make sure that the vehicle is
positioned straight up when
checking the coolant level. A
slight tilt to the side can result in
a false reading.
2. Remove panel D. (See page 6-6.)
3. Check the coolant level in the
coolant reservoir.
FULL
LOW
6
PERIODIC MAINTENANCE AND MINOR REPAIR
6-8
1D0-F8199-E2.qxd 20/9/04 11:32 Página 39

NOTE:
The coolant should be between the
minimum and maximum level marks.
4. If the coolant is at or below the
minimum level mark, open the
reservoir cap, add coolant to the
maximum level mark, and then
close the reservoir cap.
Coolant reservoir capacity:
0,3 L (0,32 US qt)
ECA10470
CAUTION
If coolant is not available, use
distilled water or soft tap water
instead. Do not use hard water
or salt water since it is harmful
to the engine.
If water has been used instead
of coolant, replace it with coo-
lant as soon as possible, other-
wise the engine may not be
sufficiently cooled and the coo-
ling system will not be protec-
ted against frost and corrosion.
If water has been added to the
coolant, have a Yamaha dealer
check the antifreeze content of
the coolant as soon as possi-
ble, otherwise the effective-
ness of the coolant will be
reduced.
EWA10380
s s
WARNING
Never attempt to remove the radia-
tor cap when the engine is hot.
5. Install the panel.
NOTE:
If the engine overheats, see page
6-31 for further instructions.
EAU20370
To change the coolant
1. Radiator cap bolt
2. Radiador cap
1. Put the vehicle on a level place.
2. Remove cowling C and panel D.
(See page 6-5 ~ 6-6.)
3. Remove the radiator cap stopper
bolt and the radiator cap.
1. Drain bolt
4. Place a container under the engi-
ne and remove the coolant drain
bolt.
5. Disconnect the coolant reservoir
hose on the reservoir side and
drain the coolant from the reser-
voir.
6. After draining the coolant, tho-
roughly flush the cooling system
with clean tap water.
7. Replace the coolant drain bolt
washer if it is damaged, and then
tighten the coolant drain bolt to
the specified torque.6
PERIODIC MAINTENANCE AND MINOR REPAIR
6-9
2
11
1D0-F8199-E2.qxd 20/9/04 11:32 Página 40

Tightening torque:
Coolant drain bolt:
10 Nm (1,0 m•kgf)
8. Connect the coolant reservoir
hose.
9. Pour the recommended coolant
into the radiator until it is full.
Recommended antifreeze:
High quality ethylene glycol antifree-
ze containing corrosion inhibitors for
aluminum engines
Antifreeze/water mixing ratio:
1:1
Coolant quantity:
Radiator capacity (including all rou-
tes):
0,92 L (0,97 US qt)
Coolant reservoir capacity:
0,3 L (0,32 US qt)
ECA10470
CAUTION
If coolant is not available, use
distilled water or soft tap water
instead. Do not use hard water
or salt water since it is harmful
to the engine.
If water has been used instead
of coolant, replace it with coo-
lant as soon as possible, other-
wise the engine may not be
sufficiently cooled and the coo-
ling system will not be protec-
ted against frost and corrosion.
If water has been added to the
coolant, have a Yamaha dealer
check the antifreeze content of
the coolant as soon as possi-
ble, otherwise the effective-
ness of the coolant will be
reduced.
10. Install the radiator cap.
11. Run the engine several minutes.
Stop the engine and recheck the
coolant level in the radiator. If it is
low, add more coolant until it rea-
ches the top of the radiator.
12. Install the radiator cap stopper
bolt.
13. Fill the coolant reservoir with
coolant up to maximum level.
14. Install the coolant reservoir cap
and check for coolant leakage.
NOTE:
If any leakage is found, ask a Yamaha
dealer to inspect the cooling system.
15. Install the cowling and the panel.
EAU20831
Cleaning the air filter
element and check hose
The air filter element should be clea-
ned at the intervals specified in the
periodic maintenance and lubrication
chart. Clean the air filter element more
frequently if you are riding in unu-
sually wet or dusty areas. In addition,
the air filter check hose must be fre-
quently checked and cleaned if
necessary.
1. Screws (x3)
6
PERIODIC MAINTENANCE AND MINOR REPAIR
6-10
1
1D0-F8199-E2.qxd 20/9/04 11:32 Página 41

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