Yamaha DT125X, DT125R User Manual
OWNER’S MANUAL
DT125R
DT125X
1D0-F8199-E2
INTRODUCTION
EAU10100
Welcome to the Yamaha world of motorcycling!
As the owner of the DT125R/X, you are benefiting from Yamaha’s vast experience and newest technology regarding the
design and manufacture of high-quality products, which have earned Yamaha a reputation for dependability.
Please take the time to read this manual thoroughly, so as to enjoy all advantages of your DT125R/X. The owner’s
manual does not only instruct you in how to operate, inspect and maintain your motorcycle, but also in how to safeguard yourself and others from trouble and injury.
In addition, the many tips given in this manual will help keep your motorcycle in the best possible condition. If you have
any further questions, do not hesitate to contact your Yamaha dealer.
The Yamaha team wishes you many safe and pleasant rides. So, remember to put safety first!
IMPORTANT MANUAL INFORMATION
Particularly important information is distinguished in this manual by the following notations:
EAU10150
t
The Safety Alert Symbol means ATTENTION! BECOME ALERT! YOUR SAFETY IS
INVOLVED!
ss
WARNING Failure to follow WARNING instructions could result in severe injury or death to the
motorcycle operator, a bystander, or a person inspecting or repairing the motorcycle.
CAUTION A CAUTION indicates special precautions that must be taken to avoid damage to
the motorcycle.
NOTE: A NOTE provides key information to make procedures easier or clearer.
NOTE:
● This manual should be considered a permanent part of this motorcycle and should remain with it even if the
motorcycle is subsequently sold.
● Yamaha continually seeks advancements in product design and quality. Therefore, while this manual contains the
most current product information available at the time of printing, there may be minor discrepancies between your
motorcycle and this manual. If you have any questions concerning this manual, please consult your Yamaha dealer.
EWA10030
ss
WARNING
PLEASE READ THIS MANUAL CAREFULLY AND COMPLETELY BEFORE OPERATING THIS MOTORCYCLE.
IMPORTANT MANUAL INFORMATION
EAUS1171
DT125R/X
OWNER’S MANUAL
©2004 by YAMAHA MOTOR SPAIN S.A.
1st edition, July 2004
All rights reserved
Any reprinting or unauthorized use
without the written permission of
YAMAHA MOTOR SPAIN S.A.
is expressly prohibited.
Printed in Spain.
TABLE OF CONTENTS
SAFETY INFORMATION.....................1-1
DESCRIPTION.....................................2-1
Left view ...........................................2-1
Right view .........................................2-2
Controls and instruments .................2-3
INSTRUMENTS AND CONTROL
FUNCTIONS ........................................3-1
Main switch/steering lock.................3-1
Indicator and warning lights .............3-2
Speedometer unit .............................3-3
Handlebar switches ..........................3-3
Clutch lever.......................................3-4
Shift pedal.........................................3-4
Brake lever........................................3-5
Brake pedal.......................................3-5
Fuel tank cap ....................................3-5
Catalytic converter............................3-6
2-stroke engine oil............................3-7
Fuel cock ..........................................3-7
Starter (choke) lever..........................3-8
Seat...................................................3-8
Shock absorber ................................3-9
YEIS handling precautions ...............3-9
YPVS.................................................3-9
Sidestand........................................3-10
Ignition circuit cut-off system.........3-10
PRE-OPERATION CHECKS...............4-1
Pre-operation check list....................4-2
OPERATION AND IMPORTANT RIDING
POINTS................................................5-1
Starting a cold engine ......................5-1
Starting a warm engine ....................5-2
Shifting..............................................5-2
Engine break-in.................................5-2
Parking..............................................5-3
PERIODIC MAINTENANCE AND
MINOR REPAIR...................................6-1
Owner’s tool kit.................................6-1
Periodic maintenance and
lubrication chart ............................6-2
Removing and installing cowlings
and panels.....................................6-5
Checking the spark plug ..................6-6
Transmission oil ................................6-7
Coolant .............................................6-8
Cleaning the air filter element
and check hose...........................6-10
Ajusting the carburetor ...................6-11
Adjusting the engine idling
speed...........................................6-12
Ajusting the throttle cable free
play..............................................6-12
Tires ................................................6-13
Spoke wheels .................................6-15
Adjusting the clutch lever free
play..............................................6-15
Adjusting the brake lever free
play..............................................6-16
Adjusting the brake pedal position
and free play................................6-17
Adjusting the rear brake light
switch ..........................................6-17
Checking the front and rear
brake pads ..................................6-18
Changing the brake fluid ................6-19
Checking the drive chain slack ......6-19
Adjusting the drive chain slack.......6-20
Lubricating the drive chain .............6-20
Checking and lubricating the
cables ..........................................6-21
Checking and lubricating the
throttle grip and cable.................6-21
Adjusting the autolube pump .........6-21
Checking and lubricating the
brake and shift pedals.................6-21
Checking and lubricating the
breake and clutch levers.............6-21
Checking and lubricating the
sidestand.....................................6-21
Checking the front fork...................6-22
Checking the steering.....................6-22
Checking the wheel bearings .........6-23
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
Supporting the motorcycle.............6-26
Front wheel .....................................6-26
Rear wheel......................................6-28
Troubleshooting ..............................6-29
MOTORCYCLE CARE AND
STORAGE ........................................7-1
Care ..................................................7-1
Storage .............................................7-3
SPECIFICATIONS ...............................8-1
Specifications ...................................8-1
CONSUMER INFORMATION .............9-1
Identification numbers ......................9-1
TABLE OF CONTENTS
t
SAFETY INFORMATION
MOTORCYCLES ARE SINGLE
TRACK VEHICLES. THEIR SAFE USE
1
AND OPERATION ARE DEPENDENT
UPON THE USE OF PROPER RIDING
TECHNIQUES AS WELL AS THE
EXPERTISE OF THE OPERATOR.
EVERY OPERATOR SHOULD KNOW
THE FOLLOWING REQUIREMENTS
BEFORE RIDING THIS MOTORCYCLE.
HE OR SHE SHOULD:
● OBTAIN THOROUGH INSTRUC-
TIONS FROM A COMPETENT
SOURCE ON ALL ASPECTS OF
MOTORCYCLE OPERATION.
● OBSERVE THE WARNINGS AND
MAINTENANCE REQUIREMENTS IN THE OWNER’S
MANUAL.
● OBTAIN QUALIFIED TRAINING
IN SAFE AND PROPER RIDING
TECHNIQUES.
● OBTAIN PROFESSIONAL TECH-
NICAL SERVICE AS INDICATED
BY THE OWNER’S MANUAL
AND/OR WHEN MADE NECESSARY BY MECHANICAL CONDITIONS.
EAU10310
Safe riding
● Always make pre-operation
checks. Careful checks may help
prevent an accident.
● This motorcycle is designed to
carry the operator and a passenger.
● The failure of motorists to detect
and recognize motorcycles in
traffic is the predominating cause
of automobile/motorcycle accidents. Many accidents have
been caused by an automobile
driver who did not see the
motorcycle. Making yourself
conspicuous appears to be very
effective in reducing the chance
of this type of accident.
Therefore:
• Wear a brightly colored jacket.
• Use extra caution when approaching and passing through
intersections, since intersections are the most likely places
for motorcycle accidents to
occur.
• Ride where other motorists can
see you. Avoid riding in another motorist’s blind spot.
1-1
● Many accidents involve inexpe-
rienced operators. In fact, many
operators who have been involved in accidents do not even
have a current motorcycle license.
• Make sure that you are qualified and that you only lend your
motorcycle to other qualified
operators.
• Know your skills and limits.
Staying within your limits may
help you to avoid an accident.
• We recommend that you practice riding your motorcycle
where there is no traffic until
you have become thoroughly
familiar with the motorcycle
and all of its controls.
● Many accidents have been cau-
sed by error of the motorcycle
operator. A typical error made by
the operator is veering wide on a
turn due to EXCESSIVE SPEED
or undercornering (insufficient
lean angle for the speed).
SAFETY INFORMATION
t
• Always obey the speed limit
and never travel faster than
warranted by road and traffic
conditions.
• Always signal before turning or
changing lanes. Make sure that
other motorists can see you.
● The posture of the operator and
passenger is important for proper
control.
• The operator should keep both
hands on the handlebar and
both feet on the operator footrests during operation to
maintain control of the
motorcycle.
• The passenger should always
hold onto the operator, the seat
strap or grab bar, if equipped,
with both hands and keep both
feet on the passenger footrests.
• Never carry a passenger
unless he or she can firmly place both feet on the passenger
footrests.
● Never ride under the influence of
alcohol or other drugs.
Protective apparel
The majority of fatalities from
motorcycle accidents are the result of
head injuries. The use of a safety helmet is the single most critical factor in
the prevention or reduction of head
injuries.
● Always wear an approved hel-
met.
● Wear a face shield or goggles.
Wind in your unprotected eyes
could contribute to an impairment of vision that could delay
seeing a hazard.
● The use of a jacket, heavy boots,
trousers, gloves, etc., is effective
in preventing or reducing abrasions or lacerations.
● Never wear loose-fitting clothes,
otherwise they could catch on
the control levers, footrests, or
wheels and cause injury or an
accident.
● Never touch the engine or
exhaust system during or after
operation. They become very hot
and can cause burns. Always
wear protective clothing that
covers your legs, ankles, and
feet.
● Passengers should also observe
the precautions mentioned above.
Modifications
Modifications made to this motorcycle not approved by Yamaha, or the
removal of original equipment, may
render the motorcycle unsafe for use
and may cause severe personal injury.
Modifications may also make your
motorcycle illegal to use.
1
1-2
t
SAFETY INFORMATION
Loading and accessories
Adding accessories or cargo to your
motorcycle can adversely affect sta-
1
bility and handling if the weight distribution of the motorcycle is changed.
To avoid the possibility of an accident, use extreme caution when
adding cargo or accessories to your
motorcycle. Use extra care when
riding a motorcycle that has added
cargo or accessories. Here are some
general guidelines to follow if loading
cargo or adding accessories to your
motorcycle:
Loading
The total weight of the operator, passenger, accessories and cargo must
not exceed the maximum load limit of
178 kg (392 lb) DT125R, 180 kg (396
lb) DT125X. When loading within this
weight limit, keep the following in
mind:
● Cargo and accessory weight
should be kept as low and close
to the motorcycle as possible.
Make sure to distribute the
weight as evenly as possible on
both sides of the motorcycle to
minimize imbalance or instability.
● Shifting weights can create a
sudden imbalance. Make sure
that accessories and cargo are
securely attached to the
motorcycle before riding. Check
accessory mounts and cargo restraints frequently.
● Never attach any large or heavy
items to the handlebar, front fork,
or front fender. These items,
including such cargo as sleeping
bags, duffel bags, or tents, can
create unstable handling or a
slow steering response.
Accessories
Genuine Yamaha accessories have
been specifically designed for use on
this motorcycle. Since Yamaha cannot test all other accessories that may
be available, you must personally be
responsible for the proper selection,
installation and use of non-Yamaha
accessories. Use extreme caution
when selecting and installing any
accessories.
Keep the following guidelines in mind,
as well as those provided under “Loading” when mounting accessories.
1-3
● Never install accessories or carry
cargo that would impair the performance of your motorcycle.
Carefully inspect the accessory
before using it to make sure that
it does not in any way reduce
ground clearance or cornering
clearance, limit suspension travel, steering travel or control operation, or obscure lights or reflectors.
• Accessories fitted to the handlebar or the front fork area can
create instability due to improper weight distribution or
aerodynamic changes. If
accessories are added to the
handlebar or front fork area,
they must be as lightweight as
possible and should be kept to
a minimum.
SAFETY INFORMATION
t
• Bulky or large accessories may
seriously affect the stability of
the motorcycle due to aerodynamic effects. Wind may
attempt to lift the motorcycle,
or the motorcycle may become
unstable in cross winds. These
accessories may also cause
instability when passing or
being passed by large vehicles.
• Certain accessories can displace the operator from his or
her normal riding position. This
improper position limits the freedom of movement of the operator and may limit control ability, therefore, such
accessories are not recommended.
● Use caution when adding electri-
cal accessories. If electrical
accessories exceed the capacity
of the motorcycle’s electrical system an electric failure could
result, which could cause a dangerous loss of lights or engine
power.
Gasoline and exhaust gas
● GASOLINE IS HIGHLY FLAMMA-
BLE:
• Always turn the engine off
when refueling.
• Take care not to spill any gasoline on the engine or exhaust
system when refueling.
• Never refuel while smoking or
in the vicinity of an open flame.
● Never start the engine or let it run
for any length of time in a closed
area. The exhaust fumes are poisonous and may cause loss of
consciousness and death within
a short time. Always operate your
motorcycle in an area that has
adequate ventilation.
● Always turn the engine off before
leaving the motorcycle unattended and remove the key from the
main switch. When parking the
motorcycle, note the following:
• The engine and exhaust system may be hot, therefore,
park the motorcycle in a place
where pedestrians or children
are not likely to touch these hot
areas.
1-4
• Do not park the motorcycle on
a slope or soft ground, otherwise it may fall over.
• Do not park the motorcycle
near a flammable source (e.g.,
a kerosene heater, or near an
open flame), otherwise it could
catch fire.
● When transporting the motorcy-
cle in another vehicle, make sure
that it is kept upright and that the
fuel cock(s) are turned to “ON” or
“RES” (for vacuum type)/”OFF”
(for manual type). If the motorcycle should lean over, gasoline
may leak out of the carburetor or
fuel tank.
● If you should swallow any gasoli-
ne, inhale a lot of gasoline vapor,
or allow gasoline to get into your
eyes, see your doctor immediately. If any gasoline spills on your
skin or clothing, immediately
wash the affected area with soap
and water and change your clothes.
1
DESCRIPTION
Left view
2
1. Headlight (page 6-24)
2. Radiator cover (page 6-5)
3. Fuel cock (page 3-7)
4. Air filter (page 6-10)
5. Choke lever (page 3-8)
6. Shift pedal (page 3-4)
7. Y.E.I.S (page 3-9)
8. Y.P.V.S. (page 3-9)
9. Oil tank (page 3-7)
1 7
8 5
2
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9
63 4
2-1
Right view
DESCRIPTION
EAU10420
11. Tool kit (page 6-1)
12. Fuse (page 6-24)
13. Coolant tank (page 6-8)
14. Rear brake pedal (page 3-5)
13
11
2
12 14
2-2
DESCRIPCION
0
k
m
/
h
40
60
80
100
120
130
20
y
0
0
0
0
1
5
000
8
Controls and instruments
EAU10430
2
16. Clutch lever (page 3-4)
17. Left handlevar swicht (page 3-3)
18. Speedometer (Page 3-3)
19. Coolant temperature warning lamp (page 3-3)
20. Indicators (page 3-2)
21. Right handlevar swicht (page 3-3)
22. Front brake lever (page 3-5)
23. Throttle grip (page 6-12)
24. Fuel tank cap (page 3-5)
25. Main Switch (page 3-1)
16
17
18 19
20
2524
21
22
23
2-3
O
N
O
F
F
P
U
S
H
L
O
C
K
I
G
N
I
T
I
O
N
INSTRUMENT AND CONTROL FUNCTIONS
EAU10460
Main switch/steering lock
The main switch/steering lock controls the ignition and lighting systems,
and is used to lock the steering. The
various positions are described
below.
EAU10550
ON
All electrical circuits are supplied with
power, the meter lighting, taillight,
license plate light and auxiliary lights
come on, and the engine can be started. The key cannot be removed.
NOTE:
The headlights come on automatically
when the engine is started and stay
on until the key is turned to “OFF”,
even if the engine stalls.
EAU10660
OFF
All electrical systems are off. The key
can be removed.
EAU10680
LOCK
The steering is locked, and all electrical systems are off. The key can be
removed.
To lock the steering
1. Turn the handlebars all the way to
the left.
2. Push the key in from the “OFF”
position, and then turn it to
“LOCK” while still pushing it.
3. Remove the key.
To unlock the steering
Push the key in, and then turn it to
“OFF” while still pushing it.
EWA10060
ss
WARNING
Never turn the key to “OFF” or
“LOCK” while the vehicle is
moving, otherwise the electrical
systems will be switched off, which
may result in loss of control or an
accident. Make sure that the vehicle is stopped before turning the
key to “OFF” or “LOCK”.
3
3-1
0
km/h
40
60
80
100
120
130
20
y
00001
5
0008
b
j
z
N
INSTRUMENT AND CONTROL FUNCTIONS
Indicator and warning lights
1
3
2
4
1. Turn signal indicator light “b”
2. Dimmer indicator light “j”
3. Neutral indicator light “N”
4. Oil level warning light “z”
Turn signal indicator lights “c” and
“d”
The corresponding indicator light flashes when the turn signal switch is
pushed to the left or right.
Neutral indicator light “N”
This indicator light comes on when
the transmission is in the neutral position.
EAU11002
3
EAU11030
EAU11070
EAU11080
High beam indicator light “j”
This indicator light comes on when
the high beam of the headlight is switched 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 operation, stop immediately and fill the oil
tank with Yamalube 2 or equivalent 2stroke engine oil of either JASO grade
“FC” or ISO grades “EG-C” or “EGD”. 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 sufficient.
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.
3-2
0
km
/h
40
60
80
100
120
130
20
y
00001
5
000
8
b
j
z
N
INSTRUMENT AND CONTROL FUNCTIONS
EAU11640
Speedometer unit
1
4
3
1. Odometer
2. Tripmeter
3. Reset button
4. Coolant temperature warning lamp
The speedometer unit is equipped
with a speedometer, an odometer and
a tripmeter. The speedometer shows
riding speed. The odometer shows
the total distance traveled. The tripmeter shows the distance traveled
since it was last set to zero with the
reset knob. The tripmeter can be used
to estimate the distance that can be
traveled with a full tank of fuel. This
information will enable you to plan
future fuel stops.
2
NOTE:
Only for the German model equipped
with a speed limiter:
The speed limiter prevents the vehicle
from exceeding a riding speed of 80
km/h.
EAU12343
Handlebar switches
1
4
3
2
1. Dimmer switch “j/k”
2. Horn switch “a”
3. Turn signal switch “c/d”
4. Hazard switch “ ”
EAU12400
Dimmer switch “j/k”
Set this switch to “j” for the high
beam and to “k” for the low beam.
3-3
EAU12460
Turn signal switch “c/d”
To signal a right-hand turn, push this
switch to “d”. To signal a left-hand
turn, push this switch to “c”. When
released, the switch returns to the
center position. To cancel the turn
signal lights, push the switch in after it
has returned to the center position.
EAU12500
Horn switch “a”
Press this switch to sound the horn.
EAU12660
Engine stop switch “f/e”
1
2
1. Stop switch “f/e”
2. Start switch “g”
Set this switch to “f” before starting
the engine. Set this switch to “e” to
3
INSTRUMENT AND CONTROL FUNCTIONS
stop the engine in case of an emergency, such as when the motorcycle
overturns or when the throttle cable is
stuck.
Start switch “g”
Push this switch to crank the engine
3
with the starter.
CAUTION
See page 5-1 for starting instructions prior to starting the engine.
Hazard switch “ ”
With the key in the “ON” position, turn
this switch to “ ” to turn on the
hazard lights (simultaneous flashing
of all turn signal lights).
The hazard lights are used in case of
an emergency or to warn other drivers
when your vehicle is stopped where it
might be a traffic hazard.
CAUTION
Do not use the hazard light for an
extended length of time, otherwisethe battery may discharge.
EAU12710
ECA10050
EAU12763
ECA10060
EAU12820
Clutch lever
1
1. Clutch lever
The clutch lever is located at the left
handlebar grip. To disengage the
clutch, pull the lever toward the handlebar grip. To engage the clutch, release the lever. The lever should be
pulled rapidly and released slowly for
smooth clutch operation.
The clutch lever is equipped with a
clutch switch, which is part of the
ignition circuit cut-off system. (See
page 3-11.)
EAU12880
Shift pedal
1
N. Neutral
1. Shift pedal
The shift pedal is located on the left
side of the engine and is used in combination with the clutch lever when
shifting the gears of the 6-speed
constant-mesh transmission equipped on this motorcycle.
NOTE:
Use your toes or heel to shift up and
your toes to shift down.
3-4
INSTRUMENT AND CONTROL FUNCTIONS
EAU12890
Brake lever
1
1. Brake lever
The brake lever is located at the right
handlebar grip. To apply the front brake, pull the lever toward the handlebar grip.
EAU12941
Brake pedal
1
1. Brake pedal
The brake pedal is on the right side of
the motorcycle. To apply the rear brake, press down on the brake pedal.
EAU13150
Fuel tank cap
To remove the fuel tank cap
1. Insert the key into the lock and
turn it 1/4 turn counterclockwise.
2. Turn the fuel tank cap 1/3 turn
counterclockwise and pull it off.
3
2
1
3
1. Fuel tank cap
2. Unlock
3. Open
To install the fuel tank cap
1. Insert the fuel tank cap into the
tank opening with the key inserted in the lock, and then turn the
cap 1/3 turn clockwise.
2. Turn the key 1/4 turn clockwise,
and then remove it.
3-5
INSTRUMENT AND CONTROL FUNCTIONS
NOTE:
The fuel tank cap cannot be installed
unless the key is in the lock. In addition, the key cannot be removed if the
cap is not properly installed and locked.
ss
3
WARNING
Make sure that the fuel tank cap is
properly closed and locked before
riding.
Fuel
Make sure that there is sufficient fuel
in the tank. When refueling, be sure to
insert the pump nozzle into the fuel
tank filler hole and to fill the tank to
the bottom of the filler tube as shown.
1. Filing pipe
2. Fuel level
EWA10120
EAU13220
1
2
EWA10880
ss
WARNING
● Do not overfill the fuel tank,
otherwise it may overflow
when the fuel warms up and
expands.
● Avoid spilling fuel on the hot
engine.
ECA10070
CAUTION
Immediately wipe off spilled fuel
with a clean, dry, soft cloth, since
fuel may deteriorate painted surfaces or plastic parts.
EAU13320
Recommended fuel:
REGULAR UNLEADED GASOLINE
ONLY
Fuel tank capacity:
10,7 L (2,82 US gal) (2,35 Imp.gal)
Fuel reserve amount:
1,8 L (0,48 US gal) (0,40 Imp.gal)
3-6
ECA11400
CAUTION
Use only unleaded gasoline. The
use of leaded gasoline will cause
severe damage to internal engine
parts, such as the valves and piston
rings, as well as to the exhaust system.
Your Yamaha engine has been designed to use regular unleaded gasoline
with a research octane number of 91
or higher. If knocking (or pinging)
occurs, use a gasoline of a different
brand or premium unleaded fuel. Use
of unleaded fuel will extend spark
plug life and reduce maintenance
costs.
EAU13430
Catalytic converter
This model is equipped with a catalytic converter in the exhaust chamber.
ss
WARNING
The exhaust system is hot after
operation. Make sure that the
exhaust system has cooled down
before doing any maintenance
work.
EWA10860
INSTRUMENT AND CONTROL FUNCTIONS
ECA10700
CAUTION
The following precautions must be
observed to prevent a fire hazard or
other damages.
● Use only unleaded gasoline.
The use of leaded gasoline will
cause unrepairable damage to
the catalytic converter.
● Never park the vehicle near
possible fire hazards such as
grass or other materials that
easily burn.
● Do not allow the engine to idle
too long.
EAU13460
2-stroke engine oil
1
2
Make sure that there is sufficient oil in
the 2-stroke engine oil tank. Add the
recommended 2-stroke engine oil if
necessary.
NOTE:
Make sure that the 2-stroke engine oil
tank cap is properly installed.
Recommended oil:
Yamalube 2 or equivalent 2-stroke
engine oil (JASO grade “FC”, or ISO
grades “EG-C” or “EG-D”)
Oil quantity:
1,3 L (1,37 US qt) (0,29 Imp.qt)
EAU13560
Fuel cock
The fuel cock supplies fuel from the
tank to the carburetor while filtering it
also.
The fuel cock has three positions:
OFF
1
1. Arrow mark
With the lever in this position, fuel will
not flow. Always return the lever to
this position when the engine is not
running.
ON
1
3
1. Oil tank cap
2. Sensor
With the lever in this position, fuel
flows to the carburetor. Normal riding
is done with the lever in this position.
3-7
INSTRUMENT AND CONTROL FUNCTIONS
RES
3
1
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
back to “ON” after refueling!
Starter (choke) lever “q”
EAU13590
Starting a cold engine requires a
richer air-fuel mixture, which is supplied by the starter (choke).
Move the lever in direction (a) to turn
on the starter (choke).
Move the lever in direction (b) to turn
off the starter (choke).
EAU13960
Seat
To remove the seat
Remove the bolts, and then pull the
seat off.
1
1. Bolt (x2)
To install the seat
1. Insert the projections on the front
of the seat into the seat holders
as shown.
2. Place the seat in the original
position, and then tighten the
bolts.
NOTE:
Make sure that the seat is properly
secured before riding.
1. Choke lever
3-8
INSTRUMENT AND CONTROL FUNCTIONS
EAU15090
Shock absorber
ss
WARNING
EWA10220
This shock absorber contains
highly pressurized nitrogen gas.
For proper handling, read and
understand the following information before handling the shock
absorber. The manufacturer cannot
be held responsible for property
damage or personal injury that may
result from improper handling.
● Do not tamper with or attempt
to open the gas cylinder.
● Do not subject the shock
absorber to an open flame or
other high heat sources, otherwise it may explode due to
excessive gas pressure.
● Do not deform or damage the
gas cylinder in any way, as this
will result in poor damping performance.
● Always have a Yamaha dealer
service the shock absorber.
EAU15250
YEIS handling precautions
1
1. YEIS
Improper installation of or damage to
any part of the YEIS (Yamaha Energy
Induction System) will result in poor
performance. Therefore, handle the
YEIS air chamber and air chamber
hose with special care and immediately replace any cracked or damaged
parts.
CAUTION
Do not attempt to modify the YEIS
in any way.
ECA10140
EAU15260
YPVS
1
3
1. YPVS
This model is equipped with the YPVS
(Yamaha Power Valve System). This
system boosts engine performance
and efficiency by means of a variable
valve in the exhaust port. The YPVS
valve is constantly adjusted in accordance with the engine speed by a
computer-controlled servomotor.
Since the YPVS is an important part
of the engine and requires very sophisticated adjustment, have a Yamaha
dealer, who has the necessary professional knowledge and experience,
make this adjustment.
3-9
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