Yamaha XT660XS User manual
IMPORTANT MANUAL INFORMATION
EAU10150
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
EWA10030
PLEASE READ THIS MANUAL CAREFULLY AND COMPLETELY BEFORE OPERATING 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
motorcycle operator, a bystander, or a person inspecting or repairing the motor-
cycle.
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:
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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
Immobilizer system .........................3-1
Main switch/steering lock ................3-2
Indicator and warning lights ............3-3
Multi-function display ......................3-5
Handlebar switches ........................3-7
Clutch lever .....................................3-8
Shift pedal .......................................3-9
Brake lever .....................................3-9
Brake pedal ....................................3-9
Fuel tank cap ................................3-10
Fuel ...............................................3-10
Catalytic converter ........................3-11
Seat ..............................................3-12
Storage compartment ...................3-12
Adjusting the shock absorber
assembly ...................................3-13
Sidestand ......................................3-14
Ignition circuit cut-off system ........3-15
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
Shifting ........................................... 5-2
Tips for reducing fuel
consumption ............................... 5-3
Engine break-in .............................. 5-3
Parking ........................................... 5-4
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 .................6-7
Engine oil and oil filter element ...... 6-9
Coolant ......................................... 6-12
Replacing the air filter element and
cleaning the check hose ........... 6-15
Adjusting the engine idling
speed ........................................ 6-16
Adjusting the throttle cable free
play ........................................... 6-17
Tires ............................................. 6-17
Spoke wheels ............................... 6-19
Adjusting the clutch lever free
play ........................................... 6-20
Adjusting the rear brake light
switch ....................................... 6-21
Checking the front and rear
brake pads ................................ 6-21
Checking the brake fluid level ...... 6-22
Drive chain slack .......................... 6-23
Lubricating the drive chain ........... 6-24
Checking and lubricating the
cables ....................................... 6-25
Checking and lubricating the
throttle grip and cable ............... 6-25
Checking and lubricating the
brake and clutch levers ............ 6-25
Lubricating the brake pedal ......... 6-26
Checking and lubricating the
sidestand .................................. 6-26
Checking the front fork ................. 6-27
Checking the steering .................. 6-27
Checking the wheel bearings ....... 6-28
Battery ......................................... 6-28
Replacing the fuses ..................... 6-30
Replacing the headlight bulb ....... 6-31
Replacing a turn signal light bulb
or the tail/brake light bulb ......... 6-32
Replacing an auxiliary light
bulb ........................................... 6-33
Supporting the motorcycle ........... 6-33
Front wheel .................................. 6-34
Rear wheel ................................... 6-35
Troubleshooting ........................... 6-37
Troubleshooting charts ................ 6-38
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TABLE OF CONTENTS
MOTORCYCLE CARE AND
STORAGE ..........................................7-1
Care ................................................7-1
Storage ...........................................7-3
SPECIFICATIONS .............................8-1
CONSUMER INFORMATION.............9-1
Identification numbers ....................9-1
Motorcycle noise regulation
(for Australia) ..............................9-2
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1-1
1
SAFETY INFORMATION
EAU10290
MOTORCYCLES ARE SINGLE
TRACK VEHICLES. THEIR SAFE USE
AND OPERATION ARE DEPENDENT
UPON THE USE OF PROPER RIDING
TECHNIQUES AS WELL AS THE EX-
PERTISE OF THE OPERATOR. EV-
ERY OPERATOR SHOULD KNOW
THE FOLLOWING REQUIREMENTS
BEFORE RIDING THIS MOTOR-
CYCLE.
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 NECES-
SARY BY MECHANICAL CONDI-
TIONS.
Safe riding
●Always make pre-operation
checks. Careful checks may help
prevent an accident.
●This motorcycle is designed to car-
ry the operator only. No passen-
gers.
●The failure of motorists to detect
and recognize motorcycles in traf-
fic 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 ap-
proaching and passing through
intersections, since intersec-
tions are the most likely places
for motorcycle accidents to oc-
cur.
•Ride where other motorists can
see you. Avoid riding in another
motorist’s blind spot.
●Many accidents involve inexperi-
enced operators. In fact, many op-
erators who have been involved in
accidents do not even have a cur-
rent motorcycle license.
•Make sure that you are qualified
and that you only lend your
motorcycle to other qualified op-
erators.
•Know your skills and limits.
Staying within your limits may
help you to avoid an accident.
•We recommend that you prac-
tice riding your motorcycle
where there is no traffic until you
have become thoroughly famil-
iar with the motorcycle and all of
its controls.
●Many accidents have been caused
error of the motorcycle operator. A
typical error made by the operator
is veering wide on a turn due to
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SAFETY INFORMATION
1-2
1
EXCESSIVE SPEED or undercor-
nering (insufficient lean angle for
the speed).
•Always obey the speed limit and
never travel faster than warrant-
ed 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 is im-
portant for proper control. The op-
erator should keep both hands on
the handlebar and both feet on the
operator footrests during operation
to maintain control of the motor-
cycle.
●Never ride under the influence of
alcohol or other drugs.
Protective apparel
The majority of fatalities from motor-
cycle accidents are the result of head
injuries. The use of a safety helmet is
the single most critical factor in the pre-
vention 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 accident.
●Never touch the engine or exhaust
system during or after operation.
They become very hot and can
cause burns. Always wear protec-
tive clothing that covers your legs,
ankles, and feet.
Modifications
Modifications made to this motorcycle
not approved by Yamaha, or the re-
moval of original equipment, may ren-
der 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 stabili-
ty and handling if the weight distribution
of the motorcycle is changed. To avoid
the possibility of an accident, use ex-
treme 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 acces-
sories to your motorcycle:
Loading
The total weight of the operator, acces-
sories and cargo must not exceed the
maximum load limit of 186 kg (410 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 imbal-
ance or instability.
●Shifting weights can create a sud-
den imbalance. Make sure that ac-
cessories and cargo are securely
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SAFETY INFORMATION
1-3
1
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, in-
cluding 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 re-
sponsible for the proper selection, in-
stallation and use of non-Yamaha
accessories. Use extreme caution
when selecting and installing any ac-
cessories.
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 perfor-
mance of your motorcycle. Care-
fully 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 ob-
scure lights or reflectors.
•Accessories fitted to the handle-
bar or the front fork area can
create instability due to improper
weight distribution or aerody-
namic 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 aerody-
namic effects. Wind may at-
tempt to lift the motorcycle, or
the motorcycle may become un-
stable in cross winds. These ac-
cessories may also cause
instability when passing or being
passed by large vehicles.
•Certain accessories can dis-
place the operator from his or
her normal riding position. This
improper position limits the free-
dom of movement of the opera-
tor and may limit control ability,
therefore, such accessories are
not recommended.
●Use caution when adding electri-
cal accessories. If electrical acces-
sories 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 gaso-
line on the engine or exhaust
pipe(s)/muffler(s) when refuel-
ing.
•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 poi-
sonous and may cause loss of
consciousness and death within a
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SAFETY INFORMATION
1-4
1
short time. Always operate your
motorcycle in an area that has ad-
equate ventilation.
●Always turn the engine off before
leaving the motorcycle unattended
and remove the key from the main
switch. When parking the motor-
cycle, note the following:
•The engine and exhaust
pipe(s)/muffler(s) 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 ker-
osene 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 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 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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DESCRIPTION
2-1
2
EAU10410
Left view
1. Windshield
2. Idle adjusting screw (page 6-16)
3. Main fuse (page 6-30)
4. Battery (page 6-28)
5. Fuse box 1 (page 6-30)
6. Fuse box 2 (page 6-30)
7. Storage compartment (page 3-12)
8. Grab bar
9. Seat lock (page 3-12)
10.Shift pedal (page 3-9)
11.Engine oil drain bolt (crankcase) (page 6-9)
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DESCRIPTION
2-2
2
EAU10420
Right view
1. Owner’s tool kit (page 6-1)
2. Air filter element (page 6-15)
3. Shock absorber assembly spring preload adjusting ring (page 3-13)
4. Rear brake fluid reservoir (page 6-22)
5. Front brake fluid reservoir (page 6-22)
6. Engine oil filler cap (page 6-9)
7. Engine oil drain bolt (oil tank) (page 6-9)
8. Coolant reservoir (page 6-12)
9. Engine oil filter element (page 6-9)
10.Coolant drain bolt (page 6-13)
11.Brake pedal (page 3-9)
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DESCRIPTION
2-3
2
EAU32240
Controls and instruments
XT660R
1. Clutch lever (page 3-8)
2. Left handlebar switches (page 3-7)
3. Main switch/steering lock (page 3-2)
4. Multi-function display (page 3-5)
5. Right handlebar switches (page 3-7)
6. Brake lever (page 3-9)
7. Throttle grip (page 6-17)
8. Fuel tank cap (page 3-10)
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INSTRUMENT AND CONTROL FUNCTIONS
3-1
3
EAU10972
Immobilizer system
This vehicle is equipped with an immo-
bilizer system to help prevent theft by
re-registering codes in the standard
keys. This system consists of the fol-
lowing.
●a code re-registering key (with a
red bow)
●two standard keys (with a black
bow) that can be re-registered with
new codes
●a transponder (which is installed in
the code re-registering key)
●an immobilizer unit
●an ECU
●an immobilizer system indicator
light (See page 3-3.)
The key with the red bow is used to reg-
ister codes in each standard key. Since
re-registering is a difficult process, take
the vehicle along with all three keys to
a Yamaha dealer to have them re-reg-
istered. Do not use the key with the red
bow for driving. It should only be used
for re-registering the standard keys. Al-
ways use a standard key for driving.
CAUTION:
ECA11820
●DO NOT LOSE THE CODE RE-
REGISTERING KEY! CONTACT
YOUR DEALER IMMEDIATELY
IF IT IS LOST! If the code re-reg-
istering key is lost, registering
new codes in the standard keys
is impossible. The standard
keys can still be used to start
the vehicle, however if code re-
registering is required (i.e., if a
new standard key is made or all
keys are lost) the entire immobi-
lizer system must be replaced.
Therefore, it is highly recom-
mended to use either standard
key and keep the code re-regis-
tering key in a safe place.
●Do not submerse any key in wa-
ter.
●Do not expose any key to exces-
sively high temperatures.
●Do not place any key close to
magnets (this includes, but not
limited to, products such as
speakers, etc.).
●Do not place heavy items on any
key.
●Do not grind any key or alter its
shape.
●Do not disassemble the plastic
part of any key.
●Do not put two keys of any im-
mobilizer system on the same
key ring.
●Keep the standard keys as well
as keys of other immobilizer
systems away from this vehi-
cle’s code re-registering key.
●Keep other immobilizer system
keys away from the main switch
as they may cause signal inter-
ference.
1. Code re-registering key (red bow)
2. Standard keys (black bow)
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INSTRUMENT AND CONTROL FUNCTIONS
3-2
3
EAU10471
Main switch/steering lock
The main switch/steering lock controls
the ignition and lighting systems, and is
used to lock the steering.
NOTE:
Be sure to use the standard key (black
bow) for regular use of the vehicle. To
minimize the risk of losing the code re-
registering key (red bow), keep it in a
safe place and only use it for code re-
registering.
EAU10570
ON
All electrical circuits are supplied with
power; the meter lighting, taillight and
auxiliary light come on, and the engine
can be started. The key cannot be re-
moved.
NOTE:
The headlight comes on automatically
when the engine is started and stays on
until the key is turned to “OFF”.
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 re-
moved.
To lock the steering
1. Turn the handlebars all the way to
the left.
2. Push the key in from the “OFF”po-
sition, and then turn it to “LOCK”
while still pushing it.
3. Remove the key.
1. Push.
2. Turn.
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INSTRUMENT AND CONTROL FUNCTIONS
3-3
3
To unlock the steering
Push the key in, and then turn it to
“OFF”while still pushing it.
WARNING
EWA10060
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 be-
fore turning the key to “OFF”or
“LOCK”.
EAU33000
(Parking)
The steering is locked, and the taillight
and auxiliary light are on. The hazard
light and turn signal lights can be turned
on, but all other electrical systems are
off. The key can be removed.
The steering must be locked before the
key can be turned to “”.
CAUTION:
ECA11020
Do not use the parking position for
an extended length of time, other-
wise the battery may discharge.
EAU11001
Indicator and warning lights
EAU11020
Turn signal indicator light “”
This indicator light flashes when the
turn signal switch is pushed to the left or
right.
EAU11060
Neutral indicator light “”
This indicator light comes on when the
transmission is in the neutral position.
1. Push.
2. Turn. 1. Engine trouble warning light “”
2. Turn signal indicator light “”
3. Fuel level warning light “”
4. High beam indicator light “”
5. Neutral indicator light “”
6. Coolant temperature warning light “”
7. Immobilizer system indicator light “”
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INSTRUMENT AND CONTROL FUNCTIONS
3-4
3
EAU11080
High beam indicator light “”
This indicator light comes on when the
high beam of the headlight is switched
on.
EAU11360
Fuel level warning light “”
This warning light comes on when the
fuel level drops below approximately
5.0 L (1.32 US gal) (1.10 Imp.gal).
When this occurs, refuel as soon as
possible.
The electrical circuit of the warning light
can be checked by turning the key to
“ON”.
If the warning light does not come on
for a few seconds, then go off, have a
Yamaha dealer check the electrical cir-
cuit.
NOTE:
This model is also equipped with a self-
diagnosis device for the fuel level de-
tection circuit. If the fuel level detection
circuit is defective, the following cycle
will be repeated until the malfunction is
corrected: The fuel level warning light
will flash eight times, then go off for 2.5
seconds. If this occurs, have a Yamaha
dealer check the vehicle.
EAU11440
Coolant temperature warning light
“”
This warning light comes on when the
engine overheats. When this occurs,
stop the engine immediately and allow
the engine to cool.
The electrical circuit of the warning light
can be checked by turning the key to
“ON”.
If the warning light does not come on
for a few seconds, then go off, have a
Yamaha dealer check the electrical cir-
cuit.
CAUTION:
ECA10020
Do not operate the engine if it is
overheated.
EAU11530
Engine trouble warning light “”
This warning light comes on or flashes
when an electrical circuit monitoring the
engine is defective. When this occurs,
have a Yamaha dealer check the self-
diagnosis system. (See page 3-5 for an
explanation of the self-diagnosis de-
vice.)
The electrical circuit of the warning light
can be checked by turning the key to
“ON”. If the warning light does not come
on for a few seconds, then go off, have
a Yamaha dealer check the electrical
circuit.
EAU26871
Immobilizer system indicator light
“”
The electrical circuit of the indicator
light can be checked by turning the key
to “ON”.
If the indicator light does not come on
for a few seconds, then go off, have a
Yamaha dealer check the electrical cir-
cuit.
When the key is turned to “OFF”and 30
seconds have passed, the indicator
light will start flashing indicating the im-
mobilizer system is enabled. After 24
hours have passed, the indicator light
will stop flashing, however the immobi-
lizer system is still enabled.
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INSTRUMENT AND CONTROL FUNCTIONS
3-5
3
NOTE:
This model is also equipped with a self-
diagnosis device for the immobilizer
system. If the immobilizer system is de-
fective, the indicator will start flashing
and the multi-function meter will display
an error code when the key is turned to
“ON”. (See “Self-diagnosis device”on
page 3-5 for details.)
EAUM1960
Multi-function display
The multi-function display is equipped
with the following:
●a speedometer (which shows the
riding speed)
●an odometer (which shows the to-
tal distance traveled)
●two tripmeters (which show the
distance traveled since they were
last set to zero)
●a fuel reserve tripmeter (which
shows the distance traveled since
the fuel level warning light came
on)
●a clock
●a self-diagnosis device
NOTE:
Be sure to turn the key to “ON”before
using the “SELECT”and “RESET”but-
tons.
Odometer and tripmeter modes
Pushing the “SELECT”button switches
the display between the odometer
mode “ODO”and the tripmeter modes
“TRIP 1”and “TRIP 2”in the following
order:
ODO →TRIP 1 →TRIP 2 →ODO
If the fuel level warning light comes on
(see page 3-3), the odometer display
will automatically change to the fuel re-
serve tripmeter mode “F-TRIP”and
start counting the distance traveled
from that point. In that case, pushing
the “SELECT”button switches the dis-
play between the various tripmeter and
odometer modes in the following order:
1. Multi-function display
2. Clock
3. Tripmeter 1
4. Odometer/fuel reserve tripmeter/tripmeter 2
5. “SELECT”button
6. “RESET”button
7. Speedometer
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