Yamaha VMX12S Owner's Manual
5GK-28199-14LIT-11626-17-15
VMX12S
OWNER’S MANUAL
EAU10041
5GK14.book Page 1 Friday, April 11, 2003 1:07 PM
INTRODUCTION
EAU10080
Congratulations on your purchase of the Yamaha VMX12. This model is the result of Yamaha’s vast experience in the production of fine sporting, touring, and pacesetting racing machines. It represents the
high degree of craftsmanship and reliability that have made Yamaha a leader in these fields.
This manual will give you an understanding of the operation, inspection, and basic maintenance of this
motorcycle. If you have any questions concerning the operation or maintenance of your motorcycle,
please consult a Yamaha dealer.
The design and manufacture of this Yamaha motorcycle fully comply with the emissions standards for
clean air applicable at the date of manufacture. Yamaha has met these standards without reducing the
performance or economy of operation of the motorcycle. To maintain these high standards, it is important that you and your Yamaha dealer pay close attention to the recommended maintenance schedules
and operating instructions contained within this manual.
5GK14.book Page 1 Friday, April 11, 2003 1:07 PM
IMPORTANT MANUAL INFORMATION
EAU10130
Particularly important information is distinguished in this manual by the following notations:
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.
WARNING
EWA10010
PLEASE READ THIS MANUAL AND THE “YOU AND YOUR MOTORCYCLE: RIDING TIPS” BOOKLET CAREFULLY
AND COMPLETELY BEFORE OPERATING THIS MOTORCYCLE. DO NOT ATTEMPT TO OPERATE THIS MOTORCYCLE UNTIL YOU HAVE ATTAINED ADEQUATE KNOWLEDGE OF ITS CONTROLS AND OPERATING FEATURES
AND UNTIL YOU HAVE BEEN TRAINED IN SAFE AND PROPER RIDING TECHNIQUES. REGULAR INSPECTIONS
AND CAREFUL MAINTENANCE, ALONG WITH GOOD RIDING SKILLS, WILL ENSURE THAT YOU SAFELY ENJOY
THE CAPABILITIES AND THE RELIABILITY OF THIS MOTORCYCLE.
The Safety Alert Symbol means ATTENTION! BECOME ALERT! YOUR SAFETY IS INVOLVED!
Failure to follow WARNING instructions could result in severe injury or death
to the motor-
cycle operator, a bystander or a person inspecting or repairing the motorcycle.
A CAUTION indicates special precautions that must be taken to avoid damage to the motorcycle.
A NOTE provides key information to make procedures easier or clearer.
WARNING
CAUTION:
NOTE:
5GK14.book Page 1 Friday, April 11, 2003 1:07 PM
IMPORTANT MANUAL INFORMATION
EAU10191
VMX12S
OWNER’S MANUAL
©2003 by Yamaha Motor Corporation,
U.S.A.
1st edition, April 2003
All rights reserved.
Any reprinting or unauthorized use
without the written permission of
Yamaha Motor Corporation, U.S.A.
is expressly prohibited.
Printed in Japan.
P/N LIT-11626-17-15
AFFIX DEALER
LABEL HERE
5GK14.book Page 2 Friday, April 11, 2003 1:07 PM
TABLE OF CONTENTS
SAFETY INFORMATION ..................1-1
Location of important labels ............1-5
DESCRIPTION ..................................2-1
Left view ..........................................2-1
Right view........................................2-2
Controls and instruments.................2-3
INSTRUMENT AND CONTROL
FUNCTIONS .......................................3-1
Main switch .....................................3-1
Indicator and warning lights ............3-1
Speedometer unit ...........................3-2
Tachometer ....................................3-3
Coolant temperature gauge ............3-3
Handlebar switches ........................3-3
Clutch lever .....................................3-5
Shift pedal .......................................3-5
Brake lever .....................................3-5
Brake pedal ....................................3-6
Fuel tank cap ..................................3-6
Fuel .................................................3-7
Starter (choke) lever .......................3-8
Steering lock ...................................3-8
Rider seat .......................................3-9
Helmet holder ...............................3-10
Adjusting the front fork ..................3-10
Adjusting the shock absorber
assemblies ................................3-11
V-Boost .........................................3-13
Sidestand ......................................3-14
Ignition circuit cut-off system ........ 3-14
PRE-OPERATION CHECKS .............4-1
Pre-operation check list .................. 4-2
OPERATION AND IMPORTANT
RIDING POINTS.................................5-1
Starting and warming up a cold
engine .........................................5-1
Starting a warm engine .................. 5-3
Shifting ...........................................5-3
Engine break-in ..............................5-4
Parking ...........................................5-5
PERIODIC MAINTENANCE AND
MINOR REPAIR ................................. 6-1
PERIODIC MAINTENANCE ........... 6-1
Owner’s tool kit ...............................6-1
Periodic maintenance chart for the
emission control system .............6-3
General maintenance and
lubrication chart ..........................6-4
Removing and installing the
cowling and panels ..................... 6-8
Checking the spark plugs ............... 6-9
Engine oil and oil filter cartridge ... 6-10
Final gear oil ................................. 6-13
Coolant ......................................... 6-14
Cleaning the air filter element ......6-17
Adjusting the carburetors ............. 6-18
Adjusting the throttle cable free
play ........................................... 6-19
Adjusting the valve clearance ...... 6-19
Tires ............................................. 6-19
Cast wheels ................................. 6-21
Accessories and replacement
parts ......................................... 6-22
Clutch lever free play ................... 6-23
Adjusting the brake lever free
play ........................................... 6-23
Adjusting the brake pedal
position ..................................... 6-24
Adjusting the rear brake light
switch ....................................... 6-24
Checking the front and rear
brake pads ................................ 6-25
Checking the brake and clutch
fluid levels ................................. 6-25
Changing the brake and clutch
fluids ......................................... 6-26
Checking and lubricating the
cables ....................................... 6-27
Checking and lubricating the
throttle grip and cable ............... 6-27
Checking and lubricating the
brake and shift pedals .............. 6-27
Checking and lubricating the
brake and clutch levers ............ 6-28
Checking and lubricating the
centerstand and sidestand ....... 6-28
Lubricating the rear suspension ... 6-29
5GK14.book Page 1 Friday, April 11, 2003 1:07 PM
TABLE OF CONTENTS
Checking the front fork .................6-29
Checking the steering ...................6-30
Checking the wheel bearings .......6-30
Battery ..........................................6-31
Replacing the fuses ......................6-33
Replacing the headlight bulb ........6-34
Replacing a turn signal light bulb
or the tail/brake light bulb ..........6-35
Front wheel ...................................6-36
Rear wheel ...................................6-37
Troubleshooting ............................6-39
Troubleshooting charts .................6-40
MOTORCYCLE CARE AND
STORAGE ..........................................7-1
Care ................................................7-1
Storage ...........................................7-3
SPECIFICATIONS .............................8-1
CONSUMER INFORMATION.............9-1
Identification numbers ....................9-1
Reporting safety defects .................9-3
Motorcycle noise regulation ............9-4
Maintenance record ........................9-5
YAMAHA MOTOR CORPORATION,
U.S.A. STREET AND ENDURO
MOTORCYCLE LIMITED
WARRANTY ...............................9-7
YAMAHA EXTENDED SERVICE
(Y.E.S.) .......................................9-9
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1-1
1
SAFETY INFORMATION
EAU10270
MOTORCYCLES ARE SINGLE
TRACK VEHICLES. THEIR SAFE USE
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 REQUIRE-
MENTS IN THE OWNER’S MAN-
UAL.
● 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.
Safe riding
● Always make pre-operation
checks. Careful checks may help
prevent an accident.
● This motorcycle is designed to car-
ry 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 you are
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.
● Many accidents involve inexperi-
enced 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 caused
by error of the motorcycle operator. A typical error made by the operator is veering wide on a turn
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SAFETY INFORMATION
1-2
1
due to EXCESSIVE SPEED or undercornering (insufficient lean angle for the speed).
• 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.
● This motorcycle is designed for on-
road use only. It is not suitable for
off-road use.
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 helmet.
● 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.
● A passenger should also observe
the above precautions.
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.
Loading and accessories
Adding accessories or cargo to your
motorcycle can adversely affect stability 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:
5GK14.book Page 2 Friday, April 11, 2003 1:07 PM
SAFETY INFORMATION
1-3
1
Loading
The total weight of the operator, passenger, accessories and cargo must
not exceed the maximum load limit of
216.0 kg (476 lb). 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 sud-
den 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 “Load-
ing” when mounting accessories.
● 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.
• 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.
5GK14.book Page 3 Friday, April 11, 2003 1:07 PM
SAFETY INFORMATION
1-4
1
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.
• 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 motorcycle
in another vehicle, make sure that
it is kept upright. If the motorcycle
should lean over, gasoline may
leak out of the carburetor or fuel
tank.
● If you should swallow any gaso-
line, 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.
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SAFETY INFORMATION
1-5
1
EAU10381
Location of important labels
Please read the following important labels carefully before operating this vehicle.
5GK14.book Page 5 Friday, April 11, 2003 1:07 PM
SAFETY INFORMATION
1-6
1
1
3
2
4
5GK14.book Page 6 Friday, April 11, 2003 1:07 PM
DESCRIPTION
2-1
2
EAU10410
Left view
1. Clutch fluid reservoir (page 6-25)
2. Air filter element (page 6-17)
3. Fuse box (page 6-33)
4. Main fuse box (page 6-33)
5. Owner’s tool kit (page 6-1)
6. Shock absorber assembly spring preload adjusting ring (page 3-11)
7. Shock absorber assembly damping force adjusting knob (page 3-11)
8. Helmet holder (page 3-10)
9. Shift pedal (page 3-5)
10.Starter (choke) lever (page 3-8)
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DESCRIPTION
2-2
2
EAU10420
Right view
1. Fuel tank cap (page 3-6)
2. Battery (page 6-31)
3. Coolant reservoir (page 6-14)
4. Front brake fluid reservoir (page 6-25)
5. Main switch (page 3-1)
6. Radiator cap (page 6-14)
7. Radiator (page 6-14)
8. Engine oil filter cartridge (page 6-10)
9. Engine oil level check window (page 6-10)
10.Brake pedal (page 3-6)
11.Rear brake fluid reservoir (page 6-25)
5GK14.book Page 2 Friday, April 11, 2003 1:07 PM
DESCRIPTION
2-3
2
EAU10430
Controls and instruments
1. Clutch lever (page 3-5)
2. Left handlebar switches (page 3-3)
3. Speedometer unit (page 3-2)
4. Right handlebar switches (page 3-3)
5. Brake lever (page 3-5)
6. Throttle grip (page 6-19)
7. Tachometer (page 3-3)
8. Coolant temperature gauge (page 3-3)
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INSTRUMENT AND CONTROL FUNCTIONS
3-1
3
EAU10450
Main switch
The main switch controls the ignition
and lighting systems. The various main
switch positions are described below.
EAU10510
ON
All electrical systems are supplied with
power, and the headlight, meter lighting, taillight and position lights come
on, and the engine can be started. The
key cannot be removed.
EAU10660
OFF
All electrical systems are off. The key
can be removed.
EAU10821
P (Parking)
The meter lighting, taillight and position
lights are on, but all other electrical systems are off. The key can be removed.
The key must be pushed in from the
“OFF” position to be turned to “P”.
CAUTION:
ECA11020
Do not use the parking position for
an extended length of time, otherwise the battery may discharge.
EAU11000
Indicator and warning lights
EAU11040
Turn signal indicator light “TURN”
This indicator light flashes when the
turn signal switch is pushed to the left or
right.
EAU11070
Neutral indicator light “NEUTRAL”
This indicator light comes on when the
transmission is in the neutral position.
1. Neutral indicator light “NEUTRAL”
2. Turn signal indicator light “TURN”
3. Fuel level warning light “FUEL”
4. High beam indicator light “HIGH BEAM”
5. Oil level warning light “OIL LEVEL”
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INSTRUMENT AND CONTROL FUNCTIONS
3-2
3
EAU11090
High beam indicator light “HIGH
BEAM”
This indicator light comes on when the
high beam of the headlight is switched
on.
EAU32330
Oil level warning light “OIL LEVEL”
This warning light comes on when the
engine oil level is low.
The electrical circuit of the warning light
can be checked according to the following procedure.
1. Set the engine stop switch to
“RUN” and turn the key to “ON”.
2. Shift the transmission into the neutral position or pull the clutch lever.
3. Push the start switch. If the warning light does not come on, have a
Yamaha dealer check the electrical circuit.
NOTE:
Even if the oil level is sufficient, the
warning light may flicker when riding on
a slope or during sudden acceleration
or deceleration, but this is not a malfunction.
EAU32320
Fuel level warning light “FUEL”
This warning light comes on when the
fuel level drops below approximately
3.0 L (0.79 us.gal) (0.66 imp.gal). When
this occurs, set the fuel reserve switch
to the “RES” position and refuel as
soon as possible.
The electrical circuit of the warning light
can be checked according to the following procedure.
1. Set the engine stop switch to
“RUN” and turn the key to “ON”.
2. Shift the transmission into the neutral position or pull the clutch lever.
3. Push the start switch. If the warning light does not come on, have a
Yamaha dealer check the electrical circuit.
EAU11630
Speedometer unit
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.
1. Tripmeter reset knob
2. Odometer
3. Tripmeter
5GK14.book Page 2 Friday, April 11, 2003 1:07 PM
INSTRUMENT AND CONTROL FUNCTIONS
3-3
3
EAU11851
Tachometer
The electric tachometer allows the rider
to monitor the engine speed and keep it
within the ideal power range.
CAUTION:
ECA10031
Do not operate the engine in the tachometer red zone.
Red zone: 8500 r/min and above
EAU12171
Coolant temperature gauge
With the key in the “ON” position, the
coolant temperature gauge indicates
the temperature of the coolant. The
coolant temperature varies with changes in the weather and engine load. If
the needle reaches or enters the red
zone, stop the vehicle and let the engine cool. (See page 6-40.)
CAUTION:
ECA10020
Do not operate the engine if it is
overheated.
EAU12341
Handlebar switches
Left
Right
1. Tachometer
2. Tachometer red zone
1. Coolant temperature gauge
2. Coolant temperature gauge red zone
1. Dimmer switch “LIGHTS”
2. Turn signal switch “TURN”
3. Horn switch “HORN”
1. Engine stop switch “ENGINE STOP”
2. Fuel reserve switch “FUEL”
3. Start switch “START”
5GK14.book Page 3 Friday, April 11, 2003 1:07 PM
INSTRUMENT AND CONTROL FUNCTIONS
3-4
3
EAU12410
Dimmer switch “LIGHTS”
Set the switch to “HI” for the high beam
and to “LO” for the low beam.
EAU12420
Turn signal switch “TURN”
To signal a right-hand turn, push this
switch to the right. To signal a left-hand
turn, push the switch to the left. When
released, the switch returns to the center position.
Since this model is equipped with a
self-canceling system, the turn signal
lights will self-cancel after the vehicle
has traveled both about 150 m (490 ft)
and for approximately 15 seconds.
However, the turn signal lights can also
be canceled manually by pushing the
switch in after it has returned to the center position.
NOTE:
The self-canceling system only operates when the vehicle is moving, so that
the turn signal lights will not self-cancel
while you are stopped at an intersection.
EAU12510
Horn switch “HORN”
Press this switch to sound the horn.
EAU12650
Engine stop switch “ENGINE STOP”
Set this switch to “RUN” before starting
the engine. Set this switch to “OFF” to
stop the engine in case of an emergency, such as when the vehicle overturns
or when the throttle cable is stuck.
EAU12690
Start switch “START”
Push this switch to crank the engine
with the starter.
CAUTION:
ECA10050
See page 5-1 for starting instructions prior to starting the engine.
EAU12790
Fuel reserve switch “FUEL”
During normal operation, this switch
should be kept in the “ON” position. If
the fuel warning light comes on while
riding, set the switch to “RES”, refuel as
soon as possible, and then set the
switch back to “ON”.
NOTE:
After switching to “RES”, approximately
3.0 L (0.79 us.gal) (0.66 imp.gal) of fuel
remain in the fuel tank.
5GK14.book Page 4 Friday, April 11, 2003 1:07 PM
INSTRUMENT AND CONTROL FUNCTIONS
3-5
3
EAU12820
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
3-14.)
EAU12870
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 5-speed constant-mesh transmission equipped on
this motorcycle.
EAU12890
Brake lever
The brake lever is located at the right
handlebar grip. To apply the front
brake, pull the lever toward the handlebar grip.
1. Clutch lever 1. Shift pedal 1. Brake lever
5GK14.book Page 5 Friday, April 11, 2003 1:07 PM
INSTRUMENT AND CONTROL FUNCTIONS
3-6
3
EAU12941
Brake pedal
The brake pedal is on the right side of
the motorcycle. To apply the rear
brake, press down on the brake pedal.
EAU13060
Fuel tank cap
To remove the fuel tank cap
1. Push the levers on the left and
right side of the rider seat backrest
as shown and slide the rider seat
backrest forward.
2. Insert the key into the lock, and
then turn it 1/4 turn clockwise. The
lock will be released and the fuel
tank cap can be removed.
To install the fuel tank cap
1. Insert the fuel tank cap into the
tank opening with the key inserted
in the lock and with the mark on the
cap facing forward.
2. Turn the key counterclockwise to
the original position, and then remove it.
3. Slide the rider seat backrest rearward and push it down.
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.
WARNING
EWA10130
Make sure that the fuel tank cap is
properly installed before riding.
1. Brake pedal
1. Opening lever
1. Unlock.
5GK14.book Page 6 Friday, April 11, 2003 1:07 PM
INSTRUMENT AND CONTROL FUNCTIONS
3-7
3
EAU13210
Fuel
Make sure that there is sufficient fuel in
the tank. Fill the fuel tank to the bottom
of the filler tube as shown.
WARNING
EWA10880
● Do not overfill the fuel tank, oth-
erwise it may overflow when the
fuel warms up and expands.
● Avoid spilling fuel on the hot en-
gine.
CAUTION:
ECA10070
Immediately wipe off spilled fuel
with a clean, dry, soft cloth, since
fuel may deteriorate painted surfaces or plastic parts.
EAU13300
CAUTION:
ECA11400
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 pump octane number
[(R+M)/2] of 86 or higher, or 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.
Gasohol
There are two types of gasohol: gasohol containing ethanol and that containing methanol. Gasohol containing
ethanol can be used if the ethanol content does not exceed 10%. Gasohol
containing methanol is not recommended by Yamaha because it can
cause damage to the fuel system or vehicle performance problems.
1. Fuel tank filler tube
2. Fuel level
Recommended fuel:
UNLEADED GASOLINE ONLY
Fuel tank capacity:
15.0 L (3.96 us.gal) (3.30 imp.gal)
Fuel reserve amount:
3.0 L (0.79 us.gal) (0.66 imp.gal)
5GK14.book Page 7 Friday, April 11, 2003 1:07 PM
INSTRUMENT AND CONTROL FUNCTIONS
3-8
3
EAU13630
Starter (choke) lever
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).
EAU13730
Steering lock
To lock the steering
1. Turn the handlebar all the way to
the right.
2. Open the steering lock cover, and
then insert the key.
3. Turn the key 1/8 turn counterclockwise, push it in while turning the
handlebar slightly to the left, and
then turn the key 1/8 turn clockwise.
4. Check that the steering is locked,
remove the key, and then close the
lock cover.
To unlock the steering
1. Open the steering lock cover, and
then insert the key.
2. Push the key in, turn it 1/8 turn
counterclockwise so that it moves
out, and then release it.
3. Remove the key, and then close
the lock cover.
1. Starter (choke) lever 1. Steering lock
5GK14.book Page 8 Friday, April 11, 2003 1:07 PM
INSTRUMENT AND CONTROL FUNCTIONS
3-9
3
EAU14230
Rider seat
To remove the rider seat
1. Release the rider seat backrest by
pushing the levers on the left and
right side as shown, and then slide
the backrest forward.
2. Remove the bolts and screws, and
then pull the rider seat off.
To install the rider seat
1. Insert the projection on the front of
the rider seat into the seat holder
as shown.
2. Place the rider seat in the original
position, and then tighten the bolts
and screws.
NOTE:
Make sure that the seat is properly secured before riding.
3. Return the rider seat backrest to
the original position.
1. Opening lever
1. Bolt
2. Screw
1. Projection
2. Seat holder
5GK14.book Page 9 Friday, April 11, 2003 1:07 PM
INSTRUMENT AND CONTROL FUNCTIONS
3-10
3
EAU14280
Helmet holder
To open the helmet holder, insert the
key into the lock, and then turn the key
as shown.
To lock the helmet holder, place it in the
original position, and then remove the
key.
WARNING
EWA10160
Never ride with a helmet attached to
the helmet holder, since the helmet
may hit objects, causing loss of control and possibly an accident.
EAU14660
Adjusting the front fork
This front fork is equipped with air
valves for adjusting the spring rate.
WARNING
EWA10180
Always adjust both fork legs equally, otherwise poor handling and loss
of stability may result.
Adjust the spring rate as follows.
1. Elevate the front wheel by placing
the vehicle on the centerstand.
NOTE:
When checking and adjusting the air
pressure, there should be no weight on
the front end of the vehicle.
2. Remove the air valve cap from
each fork leg.
3. Check the air pressure in each fork
leg with an air pressure gauge.
NOTE:
An optional air pressure gauge is available at a Yamaha dealer.
1. Helmet holder
2. Unlock.
1. Front fork air valve cap
2. Front fork air valve
1. Air pressure gauge
5GK14.book Page 10 Friday, April 11, 2003 1:07 PM
INSTRUMENT AND CONTROL FUNCTIONS
3-11
3
4. To increase the spring rate and
thereby harden the suspension, increase the air pressure with an air
pump or compressed air. To decrease the spring rate and thereby
soften the suspension, decrease
the air pressure by pushing each
valve stem down.
CAUTION:
ECA10090
Never exceed the maximum air pressure, otherwise the front fork oil
seals may become damaged.
WARNING
EWA11180
There must be no difference in air
pressure between the left and right
fork legs, otherwise poor handling
and loss of stability may result.
5. Securely install the air valve caps.
EAU15080
Adjusting the shock absorber
assemblies
Both shock absorber assemblies are
equipped with a spring preload adjusting ring and a damping force adjusting
knob.
CAUTION:
ECA10100
Never attempt to turn an adjusting
mechanism beyond the maximum or
minimum settings.
WARNING
EWA10210
Always adjust both shock absorber
assemblies equally, otherwise poor
handling and loss of stability may
result.
Spring preload
To increase the spring preload and
thereby harden the suspension, turn
the adjusting ring on each shock absorber assembly in direction (a). To decrease the spring preload and thereby
soften the suspension, turn the adjusting ring on each shock absorber assembly in direction (b).
NOTE:
● Align the bottom edge of the ad-
justing ring with the appropriate
setting on the shock absorber.
● Use the special wrench included in
the owner’s tool kit to make this adjustment.
Spring rate:
Minimum/standard (soft):
Air pressure = 40 kPa
(0.4 kgf/cm², 5.7 psi)
Maximum (hard):
Air pressure = 100 kPa
(1.0 kgf/cm², 14 psi)
1. Shock absorber assembly
5GK14.book Page 11 Friday, April 11, 2003 1:07 PM
INSTRUMENT AND CONTROL FUNCTIONS
3-12
3
Damping force
To increase the damping force and
thereby harden the damping, turn the
adjusting knob on each shock absorber
assembly in direction (a). To decrease
the damping force and thereby soften
the damping, turn the adjusting knob on
each shock absorber assembly in direction (b).
NOTE:
Align the appropriate setting on the adjusting knob with the position indicator
on the shock absorber.
WARNING
EWA10230
These shock absorbers contain
highly pressurized nitrogen gas. For
proper handling read and understand the following information before handling the shock absorbers.
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 cylinders.
● Do not subject the shock ab-
sorbers to an open flame or other high heat sources, otherwise
they may explode due to excessive gas pressure.
● Do not deform or damage the
gas cylinders in any way, as this
will result in poor damping performance.
Spring preload:
Minimum (soft):
1
Standard:
1
Maximum (hard):
5
1. Damping force adjusting knob
2. Position indicator
Damping force:
Minimum (soft):
1
Standard:
1
Maximum (hard):
4
5GK14.book Page 12 Friday, April 11, 2003 1:07 PM
INSTRUMENT AND CONTROL FUNCTIONS
3-13
3
● Always have a Yamaha dealer
service the shock absorbers.
EAU15270
V-Boost
The V-Boost is a vital part of the engine
and requires very sophisticated adjustment. Adjustment should be left to a
Yamaha dealer who has the professional knowledge and experience to do
so.
CAUTION:
ECA10170
The V-Boost was set at the Yamaha
factory after many tests. If the settings are changed by someone without sufficient technical knowledge,
poor engine performance and damage may result.
The V-Boost operation can be heard
when the main switch is turned on.
CAUTION:
ECA10180
If the V-Boost does not operate, ask
a Yamaha dealer to inspect it.
5GK14.book Page 13 Friday, April 11, 2003 1:07 PM
INSTRUMENT AND CONTROL FUNCTIONS
3-14
3
EAU15300
Sidestand
The sidestand is located on the left side
of the frame. Raise the sidestand or
lower it with your foot while holding the
vehicle upright.
NOTE:
The built-in sidestand switch is part of
the ignition circuit cut-off system, which
cuts the ignition in certain situations.
(See further down for an explanation of
the ignition circuit cut-off system.)
WARNING
EWA10240
The vehicle must not be ridden with
the sidestand down, or if the sidestand cannot be properly moved up
(or does not stay up), otherwise the
sidestand could contact the ground
and distract the operator, resulting
in a possible loss of control.
Yamaha’s ignition circuit cut-off
system has been designed to assist
the operator in fulfilling the responsibility of raising the sidestand before starting off. Therefore, check
this system regularly as described
below and have a Yamaha dealer repair it if it does not function properly.
EAU15321
Ignition circuit cut-off system
The ignition circuit cut-off system (comprising the sidestand switch, clutch
switch and neutral switch) has the following functions.
● It prevents starting when the trans-
mission is in gear and the sidestand is up, but the clutch lever is
not pulled.
● It prevents starting when the trans-
mission is in gear and the clutch lever is pulled, but the sidestand is
still down.
● It cuts the running engine when the
transmission is in gear and the sid-
estand is moved down.
Periodically check the operation of the
ignition circuit cut-off system according
to the following procedure.
WARNING
EWA10260
● The vehicle must be placed on
the centerstand during this in-
spection.
● If a malfunction is noted, have a
Yamaha dealer check the sys-
tem before riding.
5GK14.book Page 14 Friday, April 11, 2003 1:07 PM
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