2008 YAMAHA XT660Z ABS

TABLE OF CONTENTS
SAFETY INFORMATION.....................1-1
Safe riding .........................................1-1
Protective apparel .............................1-2
Modifications .....................................1-2
Loading and accessories ..................1-2
Gasoline and exhaust gas ................1-4
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
Tachometer .......................................3-6
Tripmeter and tachometer modes .....3-6
Clock mode .......................................3-7
Fuel meter .........................................3-7
Self-diagnosis devices ......................3-7
Anti-theft alarm (optional) .................3-8
Handlebar switches ...........................3-9
Clutch lever .....................................3-10
Shift pedal .......................................3-10
Brake lever ......................................3-11
Brake pedal .....................................3-11 Fuel tank cap ..................................3-11
Fuel .................................................3-12
Fuel tank breather hose ..................3-13
Catalytic converter ..........................3-13
Seat .................................................3-14
Adjusting the front fork ....................3-15
Adjusting the shock absorber
assembly ..................................3-16
Sidestand ........................................3-17
Ignition circuit cut-off system ..........3-17
PRE-OPERATION CHECKS ...............4-1
Pre-operation check list ....................4-2
OPERATION AND IMPORTANT
RIDING POINTS ..................................5-1
Starting the 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 the cowling and panels..................................6-8 Checking the spark plug ...................6-8
Engine oil and oil filter element.........6-9
Coolant ............................................6-12
Replacing the air filter element
and cleaning the check hose ..... 6-14
Checking the engine idling speed ...6-15
Checking the throttle cable free play ...................................6-16
Valve clearance ...............................6-16
Tires ................................................6-16
Spoke wheels..................................6-19
Adjusting the clutch lever free play ...................................6-20
Checking the front and rear brake pads ...............................6-21
Checking the brake fluid level .........6-22
Changing the brake fluid .................6-23
Drive chain slack .............................6-23
Cleaning and lubricating the drive chain ................................6-25
Checking and lubricating the cables .......................................6-25
Checking and lubricating the throttle grip and cable ..............6-26
Checking and lubricating the brake and clutch levers ............6-26
Lubricating the brake pedal ............6-27
Checking and lubricating the sidestand ..................................6-27

XT660Z 01-03 ING 10-03-2008 16:11 Pagina 6

DESCRIPTION
EAU10410Left view
1. Idle adjusting screw (page 6-15)
2. Owner’s tool kit (page 6-1)
3. Air filter element (page 6-14)
4. Fuse box (page 6-31)
5. Seat lock (page 3-14)6. Shock absorber assembly/spring preload adjusting ring (page 3-16)
7. Shift pedal (page 3-10)
8. Engine oil drain bolt (crankcase) (page 6-10)
9. Engine oil drain bolt (oil tank) (page 6-10)
2-1
1
2
3
4
5
6
7
8
9
10

XT660Z 01-03 ING 10-03-2008 16:11 Pagina 12

INSTRUMENT AND CONTROL FUNCTIONS
3-16
1
2
3
4
5
6
7
8
9
10
Adjust the spring preload as follows.
To increase the spring preload and
thereby harden the suspension, turn
the adjusting ring in direction (a).
To decrease the spring preload and
thereby soften the suspension, turn
the adjusting ring in direction (b).
NOTE:
Align the appropriate notch in the ad-
justing ring with the position indicator
on the shock absorber.
EWAB0020
WARNING0
Never adjust the spring preload un-
til the exhaust system has cooled
down.

EWA10220
WARNING0
This shock absorber contains high-
ly pressurized nitrogen gas. For
proper handling, read and under-
stand the following information be-
fore 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 ab-
sorber to an open flame or oth-
er high heat sources, otherwise
it may explode due to exces-
sive gas pressure.
●Do not deform or damage the
gas cylinder in any way, as this
will result in poor damping per-
formance.
●Always have a Yamaha dealer
service the shock absorber.

EAUB1460
Adjusting the shock
absorber assembly
1. Spring preload adjusting ring
2. Position indicator
(a) Increasing the spring preload
(b) Decreasing the spring preload
This shock absorber assembly is
equipped with a spring preload adjust-
ing ring.
ECA10100CAUTION:
Never attempt to turn an adjusting
mechanism beyond the maximum
or minimum settings.

Spring preload setting: Minimum (soft):1
Standard: 2
Maximum (hard): 9

XT660Z 01-03 ING 10-03-2008 16:11 Pagina 3-16

PERIODIC MAINTENANCE AND MINOR REPAIR
6-4
1
2
3
4
5
6
7
8
9
10
• Check operation and for oil leakage.
• Check operation and shock absorber for oil
leakage.
• Check operation.
• Lubricate with lithium-soap-based grease.
• Adjust engine idling speed.
• Change.
• Check oil level and vehicle for oil leakage.
• Replace.
• Check coolant level and vehicle for coolant leakage.
• Change.
• Check operation.
• Lubricate.
• Check operation and free play.
• Adjust the throttle cable free play if necessary.
• Lubricate the throttle grip housing and cable.
Front fork
Shock absorber
assembly
Rear suspension
relay arm and
connecting arm
pivoting points
Fuel injection
Engine oil
Engine oil filter
element
Cooling system
Front and rear brake
switches
Moving parts and
cables
Throttle grip housing
and cable
√√√√
√√√√
√√√√
√√
√√√√√ √
√√√√√ √
√√√
√√√√ √
√√√√√ √ √√√√ √
√√√√ √18✻
19✻
20✻
21✻
22
23
24
✻
25✻
26
27
✻
NO. ITEM CHECK OR MAINTENANCE JOBODOMETER READING (x 1,000 km)
110203040
ANNUAL
CHECK
Every 3 years

XT660Z 04-06 ING 11-03-2008 8:31 Pagina 6-4

1
2
3
4
5
6
7
8
9
10
MOTORCYCLE CARE AND STORAGE
7-2
●For motorcycles equipped with
a windshield: Do not use strong
cleaners or hard sponges as
they will cause dulling or
scratching. Some cleaning
compounds for plastic may
leave scratches on the wind-
shield. Test the product on a
small hidden part of the wind-
shield to make sure that it does
not leave any marks. If the
windshield is scratched, use a
quality plastic polishing com-
pound after washing.
After nor
mal use
Remove dirt with warm water, a mild
detergent, and a soft, clean sponge,
and then rinse thoroughly with clean
water. Use a toothbrush or bottlebrush
for hard-to-reach areas. Stubborn dirt
and insects will come off more easily if
the area is covered with a wet cloth for
a few minutes before cleaning. After r
iding in the rain, near the sea
or on salt-sprayed roads
Since sea salt or salt sprayed on roads
during winter are extremely corrosive
in combination with water, carry out
the following steps after each ride in
the rain, near the sea or on salt-
sprayed roads.
NOTE:
Salt sprayed on roads in the winter
may remain well into spring.
1. Clean the motorcycle with cold water and a mild detergent, after
the engine has cooled down.
ECA10790CAUTION:
Do not use warm water since it in-
creases the corrosive action of the
salt.
2. Apply a corrosion protection spray on all metal, including
chrome- and nickel-plated, sur-
faces to prevent corrosion. After cleaning
1. Dry the motorcycle with a chamois or an absorbing cloth.
2. Immediately dry the drive chain and lubricate it to prevent it from
rusting.
3. Use a chrome polish to shine chrome, aluminum and stainless-
steel parts, including the exhaust
system. (Even the thermally in-
duced discoloring of stainless-
steel exhaust systems can be re-
moved through polishing.)
4. To prevent corrosion, it is recom- mended to apply a corrosion pro-
tection spray on all metal, includ-
ing chrome- and nickel-plated,
surfaces.
5. Use spray oil as a universal clean- er to remove any remaining dirt.
6. Touch up minor paint damage caused by stones, etc.
7. Wax all painted surfaces.
8. Let the motorcycle dry completely before storing or covering it.

XT660Z 07-10 ING 11-03-2008 8:33 Pagina 3

INDEX
1
2
3
4
5
6
7
8
9
10
Ignition circuit cut-off system............3-17 Checking operation procedure......3-18
Immobilizer system ............................3-1
Immobilizer system indicator light ......3-4
Indicator and warning lights ...............3-3 Coolant temperature warning
light .................................................3-4
Engine trouble warning light ...........3-4
High beam indicator light ................3-4
Immobilizer system indicator light...3-4
Neutral indicator light ......................3-4
Turn signal indicator light ................3-3
Instruments ........................................2-3
Instrument and control functions........3-1
K Key identification number ...................9-1
Keys ...................................................3-1
L License plate light bulb, replacing ....6-35
Lubricating the brake and clutch levers ..................................6-26
Lubricating the brake pedal..............6-27
Lubricating the cables ......................6-25
Lubricating the drive chain ...............6-25
Lubricating the sidestand .................6-27
Lubricating the throttle grip and cable .............................................6-26
Lubricating the swingarm pivots.......6-28
M Main switch/steering lock ...................3-2 Model label .........................................9-2
Multi-function display..........................3-5
Clock mode .....................................3-7
Self-diagnosis devices ....................3-7
Tachometer .....................................3-6
Tripmeter and tachometer modes ...3-6
N Neutral indicator light .........................3-4
O Oil filter element ...............................6-10
Operation and important riding points ..............................................5-1
Owner’s tool kit...................................6-1
P Panels, removing and installing .........6-6
Parking ...............................................5-4
Pass switch ........................................3-9
Periodic maintenance and lubrication chart ..............................6-2
Periodic maintenance and minor repair...............................................6-1
Pre-operation check list......................4-2
Pre-operation checks .........................4-1
R Rear suspension, lubricating............6-27
Rear wheel .......................................6-38 Installing........................................6-39
Removing......................................6-38
Record the identification numbers .....9-1 S
Safety information ..............................1-1
Seat ..................................................3-14
Self-diagnosis devices .......................3-7
Shift pedal ........................................3-10
Shifting ...............................................5-2
Shock absorber assembly (adjusting) .....................................3-16
Sidestand .........................................3-17
Sidestand, checking and lubricating .....................................6-27
Sidestand switch, checking ..............3-18
Spark plug, checking..........................6-8
Specifications .....................................8-1
Spoke wheels ...................................6-19
Start switch ........................................3-9
Starting the engine.............................5-1
Steering, checking............................6-29
Steering lock ......................................3-2
Storage...............................................7-3
Supporting the motorcycle ...............6-36
Swingarm, lubricating the pivots ......6-28
T Tachometer ........................................3-6
Tail/brake light ..................................6-34
Throttle cable free play, checking.....6-16
Throttle grip and cable, checking and lubricating ..............................6-26
Tips for reducing fuel consumption ....5-3
Tires .................................................6-16 Air pressure ..................................6-16

XT660Z 07-10 ING 11-03-2008 8:33 Pagina 2