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8
98Refill with the same type of brake
fluid. Mixing fluids may result in a
harmful chemical reaction and
lead to poor brake performance.
8Be careful that water does not
enter the master cylinder when
refilling. Water will significantly
lower the boiling point of the fluid
and may result in vapor lock.
8Brake fluid may deteriorate paint-
ed surfaces or plastic parts.
Always clean up spilled fluid
immediately.
8Have a Yamaha dealer check
the cause if the brake fluid level
goes down.
EAU00742Brake fluid replacement
The brake fluid should be replaced
only by trained Yamaha service per-
sonnel. Have the Yamaha dealer
replace the following components
during periodic maintenance or when
they are damaged or leaking:
8oil seals (every two years)
8brake hoses (every four years)
EAU00744Drive chain slack check
NOTE:
Spin 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.
a
a. Chain slack
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EAU03006
Drive chain lubrication
The chain consists of many parts
which work with each other. If the
chain is not maintained properly, it
will wear out quickly. Therefore, the
chain must be serviced regularly.
This service is especially necessary
when riding in dusty areas. This
motorcycle is equipped with a sealed
type chain. Steam cleaning, high-
pressure washers, and solvents can
damage the drive chain, so do not
use these for cleaning it. Use only
kerosene to clean the drive chain.
Wipe it dry, and thoroughly lubricate it
with SAE 30 ~ 50W motor oil. Do not
use any other lubricants on the drive
chain. They may contain solvents
that could damage the sealed chain.
EC000097
cC
Be sure to oil the chain after wash-
ing the motorcycle or riding in the
rain.
EAU02962
Cable inspection and
lubrication
EW000112
w
Damage to the outer housing of
cables may lead to internal rusting
and interfere with the cable move-
ment. Replace damaged cables as
soon as possible to prevent unsafe
conditions.
Lubricate the cables and cable ends.
If a cable does not operate smoothly,
ask a Yamaha dealer to replace it.
Recommended lubricant:
Engine oil
EAU00773
Throttle cable and grip
lubrication
The throttle twist grip assembly
should be greased at the time that
the cable is lubricated, since the grip
must be removed to get at the end of
the throttle cable. After removing the
screws, hold the end of the cable up
in the air and put in several drops of
lubricant. With the throttle grip disas-
sembled, coat the metal surface of
the grip assembly with a suitable all-
purpose grease.
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EAU01144Wheel bearings
If there is play in the front or rear
wheel hub or if the wheel does not
turn smoothly, have a Yamaha dealer
inspect the wheel bearings.
EAU00800Battery
This motorcycle is equipped with a
sealed-type battery. Therefore it is
not necessary to check the elec-
trolyte or fill the battery with distilled
water.
8 8
If the battery seems to have dis-
charged, consult a Yamaha deal-
er.
8 8
If the motorcycle is equipped
with optional electrical acces-
sories, the battery tends to dis-
charge more quickly, so be sure
to recharge it periodically.
EC000101
cC
Never try to remove the sealing
caps of the battery cells. The bat-
tery will be damaged.
EW000116
w
Battery electrolyte is poisonous
and dangerous, causing severe
burns, etc. It contains sulfuric
acid. Avoid contact with skin, eyes
or clothing.
ANTIDOTE:
8 8
EXTERNAL: Flush with water.
8 8
INTERNAL: Drink large quanti-
ties of water or milk. Follow
with milk of magnesia, beaten
egg, or vegetable oil. Call a
physician immediately.
8 8
EYES: Flush with water for 15
minutes and get prompt med-
ical attention.
Batteries produce explosive
gases. Keep sparks, flame, ciga-
rettes etc., away. Ventilate when
charging or using in an enclosed
space. Always shield your eyes
when working near batteries.
KEEP OUT OF REACH OF CHIL-
DREN.
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1
1. Headlight connector
2. Bulb holder cover
EAU01079*
Headlight bulb replacement
If the headlight bulb burns out,
replace the bulb as follows:
1. Remove cowling A and B. (See
page 6-7 for removal and instal-
lation procedures.)
2. Disconnect the headlight con-
nector and remove the bulb hold-
er cover.
3. Remove the bulb holder.
NOTE:
Removal procedure is different
depending on the bulb holder type.
Remove your bulb holder by referring
to the above illustration.
4. Remove the defective bulb.EW000119
w
Keep flammable products and your
hands away from a bulb while it is
on, as it is hot. Do not touch a
bulb until it cools down.
Type 1Type 2
Type 3Type 4 Turn
Unhook
UnhockTurn5. Put a new bulb into position and
secure it in place with the bulb
holder.
EC000105
cC
Avoid touching the glass part of a
bulb. Keep it free from oil; other-
wise, the transparency of the
glass, life of the bulb, and lumi-
nous flux will be adversely affect-
ed. If oil gets on a bulb, thoroughly
clean it with a cloth moistened
with alcohol or lacquer thinner.
6. Install the bulb holder cover.
7. Install the headlight connector
and the cowling.
If the headlight beam adjustment
is necessary, ask a Yamaha
dealer to make adjustment.
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SPECIFICATIONS
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9
Specifications
Model TDR125
Dimensions
Overall length 2,120 mm
(F, GB, IRL, B, P, GR, E)
2,185 mm (S, SF, D, CH, A)
Overall width 840 mm
Overall height 1,295 mm
Seat height 850 mm
Wheel base 1,405 mm
Ground clearance 270 mm
Minimum turning radius 2,200 mm
Basic weight (with oil and full
fuel tank)135 kg
136 kg (CH, A)
Engine
Engine type Liquid cooled 2-stroke,
gasoline
Cylinder arrangement Forward inclined single
cylinder
Displacement 125 cm
3
Bore ´Stroke 56.0 ´50.7 mm
Compression ratio 6.6:1
Starting system Electric starter
Lubrication system Separate lubrication
(Yamaha Autolube)Engine oil (2-cycle)
Type Yamaha oil 2T or equivalent
2-stroke engine oil
Capacity
Total amount 1.2 L
Transmission oil
Type SAE 10W30 SE motor oil
Capacity
Periodic oil change 0.75 L
Total amount 0.8 L
Radiator capacity
(Including all routes) 1.05 L
Air filterWet type element
Fuel
Type Regular unleaded gasoline
Fuel tank capacity 11 L
Reserve amount 2.2 L
Carburetor
Type/quantity TM28SS/1
Manufacturer MIKUNI
EAU01038
SPECIFICATIONS
8-1
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SPECIFICATIONS
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Wheels
Front
Type Cast wheel
Size 18 ´MT2.15
Rear
Type Cast wheel
Size 17 ´MT2.50
Brakes
Front
Type Single disc brake
Operation Right hand operation
Fluid DOT 3 or DOT 4
Rear
Type Single disc brake
Operation Right foot operation
Fluid DOT 4
Suspension
Front
Type Telescopic fork
Rear
Type Swingarm (Monocross)Shock absorber
Front
Type Coil spring/oil damper
Rear
Type Coil-gas spring/oil damper
Wheel travel
Front 180 mm
Rear 180 mm
Electrical
Ignition system C.D.I.
Charging system
Type C.D.I. magneto
Standard output 14 V, 12A @5,000 r/min
Battery
Type YTX5L-BS
Voltage, capacity 12 V, 4 AH
Headlight bulb typeHalogen bulb
Bulb voltage, wattage ´quantity
Headlight 12 V, 60/55W ´2
12 V, 35/35W ´2 (GB, IRL only)
8-3
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