2008 YAMAHA XT660X ignition

TABLE OF CONTENTSSAFETY INFORMATION ..................1-1
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
Anti-theft alarm (optional) ...............3-7
Handlebar switches ........................3-7
Clutch lever .....................................3-9
Shift pedal .......................................3-9
Brake lever .....................................3-9
Brake pedal ..................................3-10
Fuel tank cap ................................3-10
Fuel ...............................................3-11
Catalytic converter ........................3-12
Seat ..............................................3-12
Storage compartment ...................3-13
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 ..................4-2OPERATION 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 cowlings
and panels .................................. 6-5
Checking the spark plug ................. 6-9
Engine oil and oil filter element .... 6-10
Coolant ......................................... 6-13
Replacing the air filter element and
cleaning the check hose ........... 6-16
Adjusting the engine idling
speed ........................................ 6-17
Checking the throttle cable free
play ........................................... 6-18
Tires ............................................. 6-18
Spoke wheels ............................... 6-21
Adjusting the clutch lever free
play ........................................... 6-21
Adjusting the rear brake light
switch ........................................ 6-22Checking the front and rear brake
pads .......................................... 6-22
Checking the brake fluid level ...... 6-23
Drive chain slack .......................... 6-24
Cleaning and lubricating the drive
chain ......................................... 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 clutch levers ............ 6-27
Lubricating the brake pedal ......... 6-28
Checking and lubricating the
sidestand .................................. 6-28
Checking the front fork ................. 6-29
Checking the steering .................. 6-29
Checking the wheel bearings ....... 6-30
Battery ......................................... 6-30
Replacing the fuses ..................... 6-32
Replacing the headlight bulb ....... 6-33
Replacing a turn signal light bulb
or the tail/brake light bulb ......... 6-34
Replacing an auxiliary light bulb .. 6-35
Supporting the motorcycle ........... 6-35
Front wheel .................................. 6-36
Rear wheel ................................... 6-37
Troubleshooting ........................... 6-39
Troubleshooting charts ................ 6-40U5VKE1E0.book Page 1 Tuesday, July 18, 2006 1:00 PM

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 onuntil 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.
U5VKE1E0.book Page 2 Tuesday, July 18, 2006 1:00 PM

INSTRUMENT AND CONTROL FUNCTIONS
3-14
3 crease the spring preload and thereby
soften the suspension, turn the adjust-
ing ring in direction (b).
NOTE:Align the appropriate notch in the ad-
justing ring with the position indicatoron the shock absorber.
WARNING
EWA10220
This shock absorber contains highly
pressurized nitrogen gas. For prop-
er handling, read and understand
the following information before
handling the shock absorber. The
manufacturer cannot be held re-
sponsible 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 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 per-
formance.


Always have a Yamaha dealerservice the shock absorber.
EAU15301
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 ofthe ignition circuit cut-off system.)
WARNING
EWA10240
The vehicle must not be ridden with
the sidestand down, or if the side-
stand 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 respon-
sibility of raising the sidestand be-
fore starting off. Therefore, check
this system regularly as described
Spring preload setting:
Minimum (soft):
1
Standard:
2
Maximum (hard):
5
U5VKE1E0.book Page 14 Tuesday, July 18, 2006 1:00 PM

INSTRUMENT AND CONTROL FUNCTIONS
3-15
3below and have a Yamaha dealer re-
pair it if it does not function proper-
ly.
EAU15311
Ignition circuit cut-off system The ignition circuit cut-off system (com-
prising the sidestand switch, clutch
switch and neutral switch) has the fol-
lowing functions.

It prevents starting when the trans-
mission is in gear and the side-
stand is up, but the clutch lever is
not pulled.


It prevents starting when the trans-
mission is in gear and the clutch le-
ver 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
EWA10250
If a malfunction is noted, have a
Yamaha dealer check the system be-fore riding.
U5VKE1E0.book Page 15 Tuesday, July 18, 2006 1:00 PM

PRE-OPERATION CHECKS
4-3
4
Throttle gripMake sure that operation is smooth.
Check cable free play.
If necessary, have Yamaha dealer adjust cable free play and lubricate cable and
grip housing.6-18, 6-27
Control cablesMake sure that operation is smooth.
Lubricate if necessary.6-27
Drive chainCheck chain slack.
Adjust if necessary.
Check chain condition.
Lubricate if necessary.6-24, 6-26
Wheels and tiresCheck for damage.
Check tire condition and tread depth.
Check air pressure.
Correct if necessary.6-18, 6-21
Brake pedalMake sure that operation is smooth.
Lubricate pedal pivoting point if necessary.6-28
Brake and clutch leversMake sure that operation is smooth.
Lubricate lever pivoting points if necessary.6-27
SidestandMake sure that operation is smooth.
Lubricate pivot if necessary.6-28
Chassis fastenersMake sure that all nuts, bolts and screws are properly tightened.
Tighten if necessary.—
Instruments, lights, signals
and switchesCheck operation.
Correct if necessary.—
Sidestand switchCheck operation of ignition circuit cut-off system.
If system is defective, have Yamaha dealer check vehicle.3-14 ITEM CHECKS PAGE
U5VKE1E0.book Page 3 Tuesday, July 18, 2006 1:00 PM

OPERATION AND IMPORTANT RIDING POINTS
5-1
5
EAU15950
WARNING
EWA10270


Become thoroughly familiar
with all operating controls and
their functions before riding.
Consult a Yamaha dealer re-
garding any control or function
that you do not thoroughly un-
derstand.


Never start the engine or oper-
ate it in a closed area for any
length of time. Exhaust fumes
are poisonous, and inhaling
them can cause loss of con-
sciousness and death within a
short time. Always make sure
that there is adequate ventila-
tion.


Before starting out, make sure
that the sidestand is up. If the
sidestand is not raised com-
pletely, it could contact the
ground and distract the opera-
tor, resulting in a possible lossof control.
EAUM1670
Starting the engine In order for the ignition circuit cut-off
system to enable starting, one of the
following conditions must be met:

The transmission is in the neutral
position.


The transmission is in gear with
the clutch lever pulled and the sid-
estand up.WARNING
EWA10290


Before starting the engine,
check the function of the igni-
tion circuit cut-off system ac-
cording to the procedure
described on page 3-15.


Never ride with the sidestanddown.
1. Turn the key to “ON” and make
sure that the engine stop switch is
set to “”.
CAUTION:
ECAM1030
The following warning lights and in-
dicator light should come on for a
few seconds, then go off.

Fuel level warning light


Coolant temperature warning
light


Engine trouble warning light


Immobilizer system indicator
light
If a warning or indicator light does
not go off, see page 3-3 for the corre-
sponding warning and indicator
light circuit check.
2. Shift the transmission into the neu-
tral position.NOTE:When the transmission is in the neutral
position, the neutral indicator light
should be on, otherwise have a
Yamaha dealer check the electrical cir-cuit.
3. Start the engine by pushing the
start switch.NOTE:If the engine fails to start, release the
start switch, wait a few seconds, and
then try again. Each starting attempt
should be as short as possible to pre-
U5VKE1E0.book Page 1 Tuesday, July 18, 2006 1:00 PM

PERIODIC MAINTENANCE AND MINOR REPAIR
6-32
6
EAUM1740
Replacing the fuses The main fuse is located behind panel
A. (See page 6-5.)
Fuse box 1 and fuse box 2 are located
under the seat. (See page 3-12.)
If a fuse is blown, replace it as follows.
1. Turn the key to “OFF” and turn off
the electrical circuit in question.
2. Remove the blown fuse, and then
install a new fuse of the specified
amperage.
CAUTION:
ECA10640
Do not use a fuse of a higher amper-
age rating than recommended to
avoid causing extensive damage to
the electrical system and possibly afire.
3. Turn the key to “ON” and turn on
the electrical circuit in question to
check if the device operates.
1. Main fuse
2. Spare main fuse
1. Fuse box 1
2. Signaling system fuse
3. Headlight fuse
4. Ignition fuse
5. Fuel injection system fuse
6. Radiator fan fuse
7. Backup fuse (for odometer, clock and immo-
bilizer system)
8. Parking lighting fuse
9. Fuse box 2
10.Spare fuse
Specified fuses:
Main fuse:
30.0 A
Fuse box 1:
Headlight fuse:
20.0 A
Signaling system fuse:
10.0 A
Radiator fan fuse:
7.5 A
Ignition fuse:
10.0 A
Fuel injection system fuse:
10.0 A
Backup fuse:
10.0 A
Fuse box 2:
Parking lighting fuse:
10.0 A
U5VKE1E0.book Page 32 Tuesday, July 18, 2006 1:00 PM

PERIODIC MAINTENANCE AND MINOR REPAIR
6-39
6


XT660X: Install the washer on the
right-hand side.


Make sure that the retainer on the
swingarm is inserted into the slot in
the brake caliper bracket.


Make sure that there is enough
space between the brake pads be-fore installing the wheel.
3. Lower the rear wheel so that it is
on the ground.
4. Adjust the drive chain slack. (See
page 6-24.)
5. Tighten the axle nut to the speci-
fied torque.6. Install the drive chain guard by in-
stalling the bolts.
EAU25870
Troubleshooting Although Yamaha motorcycles receive
a thorough inspection before shipment
from the factory, trouble may occur dur-
ing operation. Any problem in the fuel,
compression, or ignition systems, for
example, can cause poor starting and
loss of power.
The following troubleshooting charts
represent quick and easy procedures
for checking these vital systems your-
self. However, should your motorcycle
require any repair, take it to a Yamaha
dealer, whose skilled technicians have
the necessary tools, experience, and
know-how to service the motorcycle
properly.
Use only genuine Yamaha replace-
ment parts. Imitation parts may look like
Yamaha parts, but they are often inferi-
or, have a shorter service life and can
lead to expensive repair bills.
1. Retainer
2. Slot
Tightening torque:
Locknut:
16 Nm (1.6 m·kgf, 11 ft·lbf)
Axle nut:
104 Nm (10.4 m·kgf, 75 ft·lbf)
U5VKE1E0.book Page 39 Tuesday, July 18, 2006 1:00 PM