2002 YAMAHA TTR125 tow

1 - 9
GEN
INFO
CONTROL FUNCTIONS
EC150000
CONTROL FUNCTIONS
ENGINE STOP SWITCH
The engine stop switch 1 is located on the left
handlebar. Continue pushing the engine stop
switch till the engine comes to a stop.
EC152000
CLUTCH LEVER
The clutch lever 1 is located on the left han-
dlebar; it disengages or engages the clutch.
Pull the clutch lever to the handlebar to disen-
gage the clutch, and release the lever to
engage the clutch. The lever should be pulled
rapidly and released slowly for smooth starts.
EC153000
SHIFT PEDAL
The gear ratios of the constant-mesh 5 speed
transmission are ideally spaced. The gears
can be shifted by using the shift pedal 1 on
the left side of the engine.
KICKSTARTER CRANK
WARNING
Before starting the engine, be sure to shift
the transmission into neutral.
Rotate the kickstarter crank 1 away from the
engine. Push the starter down lightly with your
foot until the gears engage, then kick smoothly
and forcefully to start the engine.
EC155001
THROTTLE GRIP
The throttle grip 1 is located on the right han-
dlebar; it accelerates or decelerates the
engine. For acceleration, turn the grip toward
you; for deceleration, turn it away from you.

1 - 10
GEN
INFO
CONTROL FUNCTIONS
EC156000
FRONT BRAKE LEVER
The front brake lever 1 is located on the right
handlebar. Pull it toward the handlebar to acti-
vate the front brake.
EC157000
REAR BRAKE PEDAL
The rear brake pedal 1 is located on the right
side of the machine. Press down on the brake
pedal to activate the rear brake.
EC158010
FUEL COCK
The fuel cock supplies fuel from the tank to
carburetor while filtering the fuel. The fuel cock
has the three positions:
OFF: With the lever in this position, fuel will
not flow. Always return the lever to this
position when the engine is not running.
ON: With the lever in this position, fuel flows
to the carburetor. Normal riding is done
with the lever in this position.
RES: This indicates reserve. If you run out of
fuel while riding, move the lever to this
position. FILL THE TANK AT THE
FIRST OPPORTUNITY. BE SURE TO
SET THE LEVER TO “ON” AFTER
REFUELING.
EC159000
STARTER KNOB (CHOKE)
When cold, the engine requires a richer air-fuel
mixture for starting. A separate starter circuit,
which is controlled by the starter knob 1, sup-
plies this mixture. Pull the starter knob out to
open the circuit for starting. When the engine
has warmed up, push it in to close the circuit.

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GEN
INFO
CLEANING AND STORAGE
EC1B0000
CLEANING AND STORAGE
EC1B1000
CLEANING
Frequent cleaning of your machine will
enhance its appearance, maintain good over-
all performance, and extend the life of many
components.
1. Before washing the machine, block off
the end of the exhaust pipe to prevent
water from entering. A plastic bag
secured with a rubber band may be used
for this purpose.
2. If the engine is excessively greasy, apply
some degreaser to it with a paint brush.
Do not apply degreaser to the chain,
sprockets, or wheel axles.
3. Rinse the dirt and degreaser off with a
garden hose; use only enough pressure
to do the job.
CAUTION:
Excessive hose pressure may cause water
seepage and contamination of wheel bear-
ings, front forks, brakes and transmission
seals. Many expensive repair bills have
resulted from improper high pressure
detergent applications such as those avail-
able in coin-operated car washers.
4. After the majority of the dirt has been
hosed off, wash all surfaces with warm
water and a mild detergent. Use an old
toothbrush to clean hard-to-reach places.
5. Rinse the machine off immediately with
clean water, and dry all surfaces with a
soft towel or cloth.
6. Immediately after washing, remove
excess water from the chain with a paper
towel and lubricate the chain to prevent
rust.
7. Clean the seat with a vinyl upholstery
cleaner to keep the cover pliable and
glossy.
8. Automotive wax may be applied to all
painted or chromed surfaces. Avoid com-
bination cleaner-waxes, as they may con-
tain abrasives.
9. After completing the above, start the
engine and allow it to idle for several min-
utes.

GEN
INFO
REINIGUNG UND STILLEGUNG
REINIGUNG
Eine regelmäßige, gründliche Wäsche sorgt
nicht nur für gutes Aussehen, sondern verbes-
sert auch das allgemeine Betriebsverhalten,
reduziert Verschleiß und bewirkt somit eine län-
gere Lebensdauer und besseren Werterhalt.
1. Vor der Wäsche eine Plastiktüte über die
Schalldämpferöffnung stülpen und mit
einem Gummiband sichern, damit kein
Wasser eindringen kann.
2. Bei stark veröltem Motor mit einem Pin-
sel Kaltreiniger auftragen. Jedoch keinen
Kaltreiniger auf Antriebskette, Kettenrä-
der und Radachsen bringen.
3. Schmutz und Kaltreiniger mit einem Was-
serschlauch gründlich abspülen. Dabei
den Wasserdruck möglichst gering halten.
ACHTUNG:
Durch zu hohen Wasserdruck können Was-
ser und Verunreinigungen in Radlager,
Teleskopgabel, Schwingenlager, Bremsen,
Getriebedichtungen und elektrische Kom-
ponenten eindringen. Viele teure Reparatu-
ren sind die Folge falscher Anwendung von
Hochdruckreinigern (Dampfstrahler), wie sie
z. B. bei Münzwaschanlagen zu finden sind.
4. Nach dem Abspülen des groben Schmut-
zes alle Oberflächen mit warmem Wasser
und einem milden Reinigungsmittel abwa-
schen. Schwer zugängliche Stellen lassen
sich am besten mit einer alten Zahnbürste
oder einer Flaschenbürste reinigen.
5. Unmittelbar danach das Fahrzeug mit sau-
berem Wasser abspülen und mit einem
Waschleder, sauberen Tuch oder weichen,
saugfähigen Lappen abtrocknen.
6. Die Kette trocknen und sofort schmieren,
um Korrosion zu verhindern.
7. Die Sitzbank mit einem Reiniger für
Vinylpolster abwischen, damit der Bezug
geschmeidig und glänzend bleibt.
8. Lack- und Chromflächen können mit
Autowachs poliert werden. Kombinierte
Reiniger und Polituren sind zu vermei-
den, da sie oft Scheuermittel enthalten,
die den Lack auf Tank und Verkleidungs-
teilen beschädigen würden.
9. Nach der Wäsche den Motor anlassen
und warmlaufen lassen.
NETTOYAGE ET REMISAGE
REINIGUNG UND STILLEGUNG
NETTOYAGE ET REMISAGE
NETTOYAGE
Il est conseillé de nettoyer le véhicule à fond aussi
souvent que possible, non seulement pour des raisons
esthétiques, mais aussi parce que ces nettoyages con-
tribuent à améliorer ses performances tout en prolon-
geant la durée de service de nombreuses pièces.
1. Avant de nettoyer la machine, couvrir la sor-
tie du tuyau d’échappement pour éviter toute
infiltration d’eau. Un sachet en plastique ainsi
qu’un fort élastique feront l’affaire.
2. Si le bloc-moteur est excessivement grais-
seux, appliquer du dégraissant à l’aide d’un
pinceau. Ne pas mettre de dégraissant sur la
chaîne, les pignons ou les axes de roue.
3. Éliminer la saleté et le dégraissant au tuyau
d’arrosage. Veiller à employer juste la pres-
sion d’eau nécessaire pour effectuer ce travail.
ATTENTION:
Une pression excessive risque de causer des infil-
trations d’eau dans les roulements de roue, les
bras de fourche avant, les joints du circuit de
frein et de la transmission. L’emploi abusif de
détergents sous forte pression, tels que ceux uti-
lisés dans les portiques de lavage automatique,
est nuisible au véhicule et peut entraîner des
réparations onéreuses.
4. Après avoir éliminé le plus gros de la saleté
au tuyau d’arrosage, laver toutes les surfaces
à l’eau chaude savonneuse (employer un
détergent doux). Une vieille brosse à dents ou
un rince-bouteilles conviennent parfaitement
pour nettoyer les parties difficiles d’accès.
5. Rincer immédiatement la machine à l’eau
propre et sécher toutes les surfaces à l’aide
d’une peau de chamois, d’une serviette ou
d’un chiffon doux absorbant.
6. Sécher immédiatement la chaîne et la graisser
afin de la protéger contre la rouille.
7. Nettoyer la selle à l’aide d’un produit de net-
toyage pour similicuir afin de conserver
intacts la souplesse et le lustre de la housse.
8. De la cire pour automobile peut être utilisée
pour toutes les surfaces peintes et chromées.
Ne pas employer de cires détergentes, car
elles contiennent souvent des abrasifs.
9. Lorsque le nettoyage est terminé, mettre le
moteur en marche et le laisser tourner au
ralenti pendant plusieurs minutes.
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3 - 15
INSP
ADJ
EC360000
CHASSIS
EC361012
BRAKE SYSTEM AIR BLEEDING (TT-R125LW)
WARNING
Bleed the brake system if:
lThe system has been disassembled.
lA brake hose has been loosened or
removed.
lThe brake fluid is very low.
lThe brake operation is faulty.
A dangerous loss of braking performance
may occur if the brake system is not prop-
erly bleed.
1. Remove:
lBrake master cylinder cap
lDiaphragm
2. Bleed:
lBrake fluid
Air bleeding steps:
a. Add proper brake fluid to the reservoir.
b. Install the diaphragm. Be careful not to
spill any fluid or allow the reservoir to
overflow.
c. Connect the clear plastic tube 2 tightly
to the caliper bleed screw 1.
d. Place the other end of the tube into a
container.
e. Slowly apply the brake lever several
times.
f. Pull in the lever. Hold the lever in posi-
tion.
g. Loosen the bleed screw and allow the
lever to travel towards its limit.
h. Tighten the bleed screw when the lever
limit has been reached; then release the
lever.
T R..
Bleed screw:
6 Nm (0.6 m • kg, 4.3 ft • lb)
i. Repeat steps (e) to (h) until of the air
bubbles have been removed from the
system.
CHASSIS/BRAKE SYSTEM AIR BLEEDING (TT-R125LW)

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ENGCYLINDER AND PISTON
REMOVAL POINTS
Piston
1. Remove:
lPiston pin clips 1
lPiston pin 2
lPiston 3
NOTE:
lBefore removing the piston pin clip, cover the
crankcase opening with a clean towel or rag
to prevent the clip from falling into the crank-
case cavity.
lBefore removing each piston pin, deburr the
clip groove and pin hole area. If the piston
pin groove is deburred and the piston pin is
still difficult to remove, use the piston pin
puller 4.
CAUTION:
Do not use a hammer to drive the piston
pin out.
Piston ring
1. Remove:
lPiston rings
NOTE:
Spread the end gaps apart while at the same
time lifting the piston ring over the top of the
piston crown, as shown in the illustration.
Piston pin puller set:
YU-1304/90890-01304
INSPECTION
Cylinder and piston
1. Inspect:
lCylinder and piston walls
Vertical scratches ® Replace cylinder
and piston.

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ENGKICK AXLE AND SHIFT SHAFT
Kick idle gear
1. Install:
lCirclip 1
lWasher 2
lKick idle gear 3
lWasher 4
lCirclip 5
NOTE:
lApply the engine oil on the kick idle gear
inner circumference.
lInstall the kick idle gear with its depressed
side toward you.
New
New