Page 17 of 100
XT660ZA
DESCRIPTION
2-4
2
12. Rear brake fluid reservoir (page 6-21)
13. Fuse box 2 (page 6-31)
14. Owner’s tool kit (page 6-1)
15. Coolant reservoir (page 6-14)
16. Battery (page 6-29)
17. Front brake fluid reservoir (page 6-21)
18. Coolant drain bolt
19. Engine oil filter element (page 6-11)20. Brake pedal (page 3-12)
21. Rear wheel hub
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Page 18 of 100
EAU10430
Controls and instruments
DESCRIPTION
2-5
2
1. Clutch lever (page 3-11)
2. Left handlebar switches (page 3-9)
3. Multi-function display (page 3-6)
4. Right handlebar switches (page 3-9)
5. Throttle grip (page 6-17)
6. Brake lever (page 3-11)
7. Engine oil filler cap (page 6-11)
8. Fuel tank cap (page 3-13/3-14 )9. Main switch/steering lock (page 3-2)
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Page 19 of 100

EAU10976
Immobilizer system
1. Code re-registering key (red bow)
2. Standard keys (black bow)
This vehicle is equipped with an
immobilizer system to help prevent
theft by re-registering codes in the
standard keys. This system consists
of the following:
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 3-4)
The key with the red bow is used to
register codes in each standard key.
Since re-registering is a difficult pro-
cess, take the vehicle along with all
three keys to a Yamaha dealer to have
them re-registered. Do not use the
key with the red bow for driving. It
should only be used for re-registering
the standard keys. Always use a stan-
dard key for driving.
ECA11821
DO NOT LOSE THE CODE RE-
REGISTERING KEY! CONTACT
YOUR DEALER IMMEDIATELY
IF IT IS LOST! If the code re-
registering key is lost, registe-
ring new codes in the standard
keys is impossible. The stan-
dard 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 immobilizer system must
be replaced. Therefore, it ishighly recommended to use
either standard key and keep
the code re-registering key in a
safe place.
Do not submerse any key in
water.
Do not expose any key to
excessively high temperatures.
Do not place any key close to
magnets (this includes, but not
limited to, products such as
speakers, etc.).
Do not place items that trans-
mit electrical signals close to
any key.
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
immobilizer 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.
NOTICE
INSTRUMENT AND CONTROL FUNCTIONS
3-1
3
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Page 20 of 100

Keep other immobilizer system
keys away from the main
switch as they may cause sig-
nal interference.EAU10472
Main switch/steering lock
The main switch/steering lock con-
trols the ignition and lighting systems,
and is used to lock the steering. The
various positions are described
below.
TIP
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.
EAU10550
ON
All electrical circuits are supplied withpower, the meter lighting, taillight,
license plate light and auxiliary lights
come on, and the engine can be star-
ted. The key cannot be removed.
TIP
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.
EAU10661
OFF
All electrical systems are off. The key
can be removed.
EWA10061
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.
EAU10683
LOCK
The steering is locked, and all electri-
cal systems are off. The key can be
removed.
WARNING
INSTRUMENT AND CONTROL FUNCTIONS
3-2
3
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Page 21 of 100
To lock the steering
1. Push
2. Turn
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.T
o unlock the steering
1. Push
2. Turn
Push the key in, and then turn it to
“OFF” while still pushing it.
EAU10941
(Parking)
The steering is locked, and the tai-
llight, license plate light and auxiliary
lights are on. The hazard lights 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 “ ”.
ECA11020
Do not use the parking position for
an extended length of time, other-
wise the battery may discharge.
NOTICE
INSTRUMENT AND CONTROL FUNCTIONS
3-3
3
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EAU47040
Indicator and warning lights
For XT660Z
1. Immobilizer system indicator light
2. Neutral indicator light “ ”
3. Turn signal indicator light “ ”
4. High beam indicator light “ ”
5. Engine trouble warning light “ ”
6. Coolant temperature warning light “ ”
For XT660ZA
1. Anti-lock Brake System (ABS) warning light
“”
2. Immobilizer system indicator light
3. Neutral indicator light “ ”
4. Turn signal indicator light “ ”
5. High beam indicator light “ ”
6. Engine trouble warning light “ ”
7. Coolant temperature warning light “ ”
EAUB1510
Turn signal indicator light “ ”
This indicator light flashes when the
turn signal switch is pushed to the left
or right.
The electrical circuit of the turn signal
indicator light can be checked by tur-
ning 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
circuit.
EAUB1520
Neutral indicator light “ ”
This indicator light comes on when
the transmission is in the neutral posi-
tion.
The electrical circuit of the neutral
indicator light can be checked by tur-
ning 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
circuit.
EAUB1530
High beam indicator light “ ”
This indicator light comes on when
the high beam of the headlight is swit-
ched on.
The electrical circuit of the high beam
indicator light can be checked by tur-
ning 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
circuit.
ABS
INSTRUMENT AND CONTROL FUNCTIONS
3-4
3
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EAU11444
Coolant temperature warning light
“”
This warning light comes on if the
engine overheats. If 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”. The warning light should
come on for a few seconds, and then
go off.
If the warning light does not come on
initially when the key is turned to
“ON”, or if the warning light remains
on, have a Yamaha dealer check the
electrical circuit.
ECA10021
Do not continue to operate the
engine if it is overheating.
TIP
For radiator-fan-equipped vehi-
cles, the radiator fan(s) automati-
cally switch on or off according to
the coolant temperature in the
radiator.
If the engine overheats, see page
6-40 for further instructions.
EAU11534
Engine trouble warning light “ ”
This warning light comes on or flas-
hes if a problem is detected in the
electrical circuit monitoring the engi-
ne. If this occurs, have a Yamaha dea-
ler check the self-diagnosis system.
(See page 3-8 for an explanation of
the self-diagnosis device.)
The electrical circuit of the warning
light can be checked by turning the
key to “ON”. The warning light should
come on for a few seconds, and then
go off.
If the warning light does not come on
initially when the key is turned to
“ON”, or if the warning light remains
on, have a Yamaha dealer check the
electrical circuit.
EAU11545
ABS warning light “ ” (for ABS
models)
If this warning light comes on or flas-
hes while riding, the ABS may not
work correctly. If this occurs, have aYamaha dealer check the system as
soon as possible. (See page 3-12).
EWA10081
If the ABS warning light comes on
or flashes while riding, the brake
system reverts to conventional bra-
king. Therefore, be careful not to
cause the wheels to lock during
emergency braking. If the warning
light comes on or flashes while
riding, have a Yamaha dealer check
the brake system as soon as possi-
ble.
The electrical circuit of the warning
light can be checked by turning the
key to “ON”. The warning light should
come on for a few seconds, and then
go off.
If the warning light does not come on
initially when the key is turned to
“ON”, or if the warning light remains
on, have a Yamaha dealer check the
electrical circuit.
WARNING
ABS
NOTICE
INSTRUMENT AND CONTROL FUNCTIONS
3-5
3
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Page 24 of 100

EAU26877
Immobilizer system indicator light
“”
The electrical circuit of the indicator
light can be checked by turning the
key to “ON”. The indicator light
should come on for a few seconds,
and then go off.
If the indicator light does not come on
initially when the key is turned to
“ON”, or if the indicator light remains
on, have a Yamaha dealer check the
electrical circuit.
When the key is turned to “OFF” and
30 seconds have passed, the indica-
tor light will start flashing indicating
the immobilizer system is enabled.
After 24 hours have passed, the indi-
cator light will stop flashing, however
the immobilizer system is still ena-
bled.
The self-diagnosis device also
detects problems in the immobilizer
system circuits. (See 3-8 for an expla-
nation of the self-diagnosis device.)
EAUS1942
Multi-function display
1. Tachometer
2. Speedometer
3. Odometer
4. Tripmeters/fuel reserve tripmeter
5. Clock
6. Fuel meter
7. “RESET” button
8. “SELECT” button
EWA12312
Be sure to stop the vehicle before
making any setting changes to the
multi-function display. Changing
settings while riding can distract
the operator and increase the risk
of an accident.
The multi-function display is equip-
ped with the following:
a speedometer (which shows the
riding speed)
a digital tachometer (which
shows engine r/min)
an odometer (which shows the
total 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 sin-
ce the bottom segment of the
fuel meter started flashing)
a clock
a fuel meter
a self-diagnosis device
TIP
Be sure to turn the key to “ON”
before using the “SELECT” and
“RESET” buttons.
For the U.K. only: To switch the
speedometer and odometer/trip-
meter displays between kilome-
ters and miles, push the
“SELECT” and “RESET” buttons
together, then while holding the
WARNING
INSTRUMENT AND CONTROL FUNCTIONS
3-6
3
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