2008 YAMAHA XT660X fuel

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

PERIODIC MAINTENANCE AND MINOR REPAIR
6-40
6
EAU25921
Troubleshooting charts Starting problems or poor engine performance
WARNING
EWA10840
Keep away open flames and do not smoke while checking or working on the fuel system.
Check the fuel level in
the fuel tank.1. Fuel
There is enough fuel.
There is no fuel.
Check the compression.
Supply fuel.
The engine does not start.
Check the compression.
Operate the electric starter.2. Compression
There is compression.
There is no compression.
Check the ignition.
Have a Yamaha dealer
check the vehicle.
Remove the spark plug
and check the electrodes.3. Ignition
Wipe off with a dry cloth and correct the
spark plug gap, or replace the spark plug.
Have a Yamaha dealer check the vehicle.
The engine does not start.
Have a Yamaha dealer
check the vehicle.
The engine does not start.
Check the battery.
Operate the electric starter.4. Battery
The engine turns over
quickly.
The engine turns over
slowly.
The battery is good.Check the battery lead connections,
and charge the battery if necessary.
DryWet
Open the throttle halfway and operate
the electric starter.
U5VKE1E0.book Page 40 Tuesday, July 18, 2006 1:00 PM

MOTORCYCLE CARE AND STORAGE
7-1
7
EAU26001
Care While the open design of a motorcycle
reveals the attractiveness of the tech-
nology, it also makes it more vulnera-
ble. Rust and corrosion can develop
even if high-quality components are
used. A rusty exhaust pipe may go un-
noticed on a car, however, it detracts
from the overall appearance of a motor-
cycle. Frequent and proper care does
not only comply with the terms of the
warranty, but it will also keep your
motorcycle looking good, extend its life
and optimize its performance.
Before cleaning
1. Cover the muffler outlet with a
plastic bag after the engine has
cooled down.
2. Make sure that all caps and covers
as well as all electrical couplers
and connectors, including the
spark plug cap, are tightly in-
stalled.
3. Remove extremely stubborn dirt,
like oil burnt onto the crankcase,
with a degreasing agent and a
brush, but never apply such prod-ucts onto seals, gaskets, sprock-
ets, the drive chain and wheel
axles. Always rinse the dirt and de-
greaser off with water.
Cleaning
CAUTION:
ECA10770


Avoid using strong acidic wheel
cleaners, especially on spoked
wheels. If such products are
used on hard-to-remove dirt, do
not leave the cleaner on the af-
fected area any longer than in-
structed. Also, thoroughly rinse
the area off with water, immedi-
ately dry it, and then apply a cor-
rosion protection spray.


Improper cleaning can damage
windshields, cowlings, panels
and other plastic parts. Use only
a soft, clean cloth or sponge
with mild detergent and water to
clean plastic.


Do not use any harsh chemical
products on plastic parts. Be
sure to avoid using cloths or
sponges which have been in
contact with strong or abrasivecleaning products, solvent or
thinner, fuel (gasoline), rust re-
movers or inhibitors, brake flu-
id, antifreeze or electrolyte.


Do not use high-pressure wash-
ers or steam-jet cleaners since
they cause water seepage and
deterioration in the following ar-
eas: seals (of wheel and swing-
arm bearings, fork and brakes),
electric components (couplers,
connectors, instruments,
switches and lights), breather
hoses and vents.


For motorcycles equipped with
a windshield: Do not use strong
cleaners or hard sponges as
they will cause dulling or
scratching. Some cleaning com-
pounds for plastic may leave
scratches on the windshield.
Test the product on a small hid-
den part of the windshield to
make sure that it does not leave
any marks. If the windshield is
scratched, use a quality plastic
polishing compound afterwashing.
U5VKE1E0.book Page 1 Tuesday, July 18, 2006 1:00 PM

MOTORCYCLE CARE AND STORAGE
7-3
7


Never apply oil or wax to any
rubber and plastic parts, but
treat them with a suitable care
product.


Avoid using abrasive polishing
compounds as they will wearaway the paint.
NOTE:Consult a Yamaha dealer for advice onwhat products to use.
EAUM1900
Storage Short-term
Always store your motorcycle in a cool,
dry place and, if necessary, protect it
against dust with a porous cover.CAUTION:
ECA10810


Storing the motorcycle in a
poorly ventilated room or cover-
ing it with a tarp, while it is still
wet, will allow water and humid-
ity to seep in and cause rust.


To prevent corrosion, avoid
damp cellars, stables (because
of the presence of ammonia)
and areas where strong chemi-cals are stored.
Long-term
Before storing your motorcycle for sev-
eral months:
1. Follow all the instructions in the
“Care” section of this chapter.
2. Fill up the fuel tank and add fuel
stabilizer (if available) to prevent
the fuel tank from rusting and the
fuel from deteriorating.3. Perform the following steps to pro-
tect the cylinder, piston rings, etc.
from corrosion.
a. Remove the spark plug cap
and spark plug.
b. Pour a teaspoonful of engine oil
into the spark plug bore.
c. Install the spark plug cap onto
the spark plug, and then place
the spark plug on the cylinder
head so that the electrodes are
grounded. (This will limit spark-
ing during the next step.)
d. Turn the engine over several
times with the starter. (This will
coat the cylinder wall with oil.)
e. Remove the spark plug cap
from the spark plug, and then
install the spark plug and the
spark plug cap.
WARNING
EWA10950
To prevent damage or injury from
sparking, make sure to ground the
spark plug electrodes while turningthe engine over.
U5VKE1E0.book Page 3 Tuesday, July 18, 2006 1:00 PM

SPECIFICATIONS
8-1
8
Dimensions:Overall length:
XT660R 2240 mm (88.2 in)
XT660X 2175 mm (85.6 in)
Overall width:
XT660R 845 mm (33.3 in)
XT660X 860 mm (33.9 in)
Overall height:
XT660R 1230 mm (48.4 in)
XT660X 1170 mm (46.1 in)
Seat height:
XT660R 865 mm (34.1 in)
XT660X 875 mm (34.4 in)
Wheelbase:
XT660R 1505 mm (59.3 in)
XT660X 1490 mm (58.7 in)
Ground clearance:
XT660R 210 mm (8.27 in)
XT660X 205 mm (8.07 in)
Minimum turning radius:
2400 mm (94.5 in)Weight:With oil and fuel:
XT660R 181.0 kg (399 lb)
XT660X 186.0 kg (410 lb)Engine:Engine type:
Liquid cooled 4-stroke, SOHC
Cylinder arrangement:
Forward-inclined single cylinder
Displacement:
660.0 cm³
Bore × stroke:
100.0 × 84.0 mm (3.94 × 3.31 in)Compression ratio:
10.00 :1
Starting system:
Electric starter
Lubrication system:
Dry sump
Engine oil:Type:
SAE10W30, SAE10W40, SAE15W40,
SAE20W40 or SAE20W50
Recommended engine oil grade:
API service SE, SF, SG type or higher
Engine oil quantity:
Without oil filter element replacement:
2.50 L (2.64 US qt) (2.20 Imp.qt)
With oil filter element replacement:
2.60 L (2.75 US qt) (2.29 Imp.qt)Cooling system:Coolant reservoir capacity (up to the
maximum level mark):
0.25 L (0.26 US qt) (0.22 Imp.qt)
Radiator capacity (including all routes):
1.00 L (1.06 US qt) (0.88 Imp.qt)
Air filter:Air filter element:
Oil-coated paper elementFuel:Recommended fuel:
Premium unleaded gasoline only
Fuel tank capacity:
15.0 L (3.96 US gal) (3.30 Imp.gal)
Fuel reserve amount:
5.0 L (1.32 US gal) (1.10 Imp.gal)Fuel injector:Manufacturer:
DENSO
Model/quantity:
297500-0390Spark plug (s):Manufacturer/model:
NGK/CR7E
Spark plug gap:
0.7–0.8 mm (0.028–0.031 in)Clutch:Clutch type:
Wet, multiple-discTransmission:Primary reduction system:
Spur gear
Primary reduction ratio:
75/36 (2.083)
Secondary reduction system:
Chain drive
Secondary reduction ratio:
45/15 (3.000)
Transmission type:
Constant mesh 5-speed
-20 -10 0
10 20 30
40
50 ˚C
SAE 10W-30
SAE 15W-40SAE 20W-40SAE 20W-50
SAE 10W-40
U5VKE1E0.book Page 1 Tuesday, July 18, 2006 1:00 PM

SPECIFICATIONS
8-3
8
Recommended fluid:
DOT 4Rear brake:Type:
Single disc brake
Operation:
Right foot operation
Recommended fluid:
DOT 4Front suspension:Type:
Telescopic fork
Spring/shock absorber type:
Coil spring/oil damper
Wheel travel:
XT660R 225.0 mm (8.86 in)
XT660X 200.0 mm (7.87 in)Rear suspension:Type:
Swingarm (monocross)
Spring/shock absorber type:
Coil spring/gas-oil damper
Wheel travel:
XT660R 200.0 mm (7.87 in)
XT660X 191.0 mm (7.52 in)Electrical system:Ignition system:
Transistorized coil ignition (digital)
Charging system:
AC magnetoBattery:Model:
GT9B-4Voltage, capacity:
12 V, 8.0 Ah
Headlight:Bulb type:
Halogen bulbBulb voltage, wattage × quantity:Headlight:
12 V, 55 W/60.0 W × 1
Tail/brake light:
12 V, 5.0 W/21.0 W × 1
Front turn signal light:
12 V, 10.0 W × 2
Rear turn signal light:
12 V, 10.0 W × 2
Auxiliary light:
12 V, 5.0 W × 1
Meter lighting:
EL
Neutral indicator light:
LED
High beam indicator light:
LED
Turn signal indicator light:
LED
Fuel level warning light:
LED
Coolant temperature warning light:
LED
Engine trouble warning light:
LED
Immobilizer system indicator light:
LED
Fuses:Main fuse:
30.0 A
Headlight fuse:
20.0 A
Signaling system fuse:
10.0 A
Ignition fuse:
10.0 A
Parking lighting fuse:
10.0 A
Radiator fan fuse:
7.5 A
Fuel injection system fuse:
10.0 A
Backup fuse:
10.0 A
U5VKE1E0.book Page 3 Tuesday, July 18, 2006 1:00 PM

INDEX
AAir filter element and check hose,
replacing and cleaning ....................... 6-16
Anti-theft alarm (optional) ....................... 3-7
Auxiliary light bulb, replacing ................ 6-35BBattery .................................................. 6-30
Brake and clutch levers, checking and
lubricating ........................................... 6-27
Brake fluid level, checking .................... 6-23
Brake lever ............................................. 3-9
Brake pedal .......................................... 3-10
Brake pedal, lubricating ........................ 6-28CCables, checking and lubricating .......... 6-27
Care ........................................................ 7-1
Catalytic converter ................................ 3-12
Clutch lever............................................. 3-9
Clutch lever free play, adjusting ........... 6-21
Coolant ................................................. 6-13
Coolant temperature warning light.......... 3-4
Cowlings and panels, removing and
installing ............................................... 6-5DDimmer switch ........................................ 3-8
Drive chain, cleaning and lubricating .... 6-26
Drive chain slack .................................. 6-24EEngine break-in ...................................... 5-3
Engine idling speed .............................. 6-17
Engine oil and oil filter element............. 6-10
Engine stop switch.................................. 3-8
Engine trouble warning light ................... 3-4
FFront and rear brake pads, checking .... 6-22
Front fork, checking...............................6-29
Fuel ....................................................... 3-11
Fuel consumption, tips for reducing ........ 5-3
Fuel level warning light............................ 3-4
Fuel tank cap......................................... 3-10
Fuses, replacing .................................... 6-32HHandlebar switches ................................. 3-7
Hazard switch.......................................... 3-8
Headlight bulb, replacing....................... 6-33
High beam indicator light......................... 3-4
Horn switch ............................................. 3-8IIdentification numbers ............................. 9-1
Ignition circuit cut-off system ................. 3-15
Immobilizer system .................................3-1
Immobilizer system indicator light ........... 3-4
Indicator and warning lights .................... 3-3KKey identification number ........................ 9-1MMain switch/steering lock ........................ 3-2
Model label .............................................. 9-2
Multi-function display...............................3-5NNeutral indicator light .............................. 3-3PParking ....................................................5-4
Part locations .......................................... 2-1
Pass switch ............................................. 3-8
Periodic maintenance and lubrication
chart ......................................................6-2Pre-operation check list .......................... 4-2
RRear brake light switch, adjusting ......... 6-22SSafety information ................................... 1-1
Seat ...................................................... 3-12
Shifting .................................................... 5-2
Shift pedal ............................................... 3-9
Shock absorber assembly, adjusting .... 3-13
Sidestand .............................................. 3-14
Sidestand, checking and lubricating ..... 6-28
Spark plug, checking .............................. 6-9
Specifications.......................................... 8-1
Starting the engine.................................. 5-1
Start switch ............................................. 3-8
Steering, checking ................................ 6-29
Storage ................................................... 7-3
Storage compartment ........................... 3-13
Supporting the motorcycle .................... 6-35TThrottle cable free play, checking ......... 6-18
Throttle grip and cable, checking and
lubricating ........................................... 6-27
Tires ...................................................... 6-18
Tool kit .................................................... 6-1
Troubleshooting .................................... 6-39
Troubleshooting charts ......................... 6-40
Turn signal indicator light ........................ 3-3
Turn signal light bulb or tail/brake light
bulb, replacing .................................... 6-34
Turn signal switch ................................... 3-8VVehicle identification number .................. 9-1
U5VKE1E0.book Page 1 Tuesday, July 18, 2006 1:00 PM