TIP
The fuel tank cap cannot be closed
unless the key is in the lock. In addi-
tion, the key cannot be removed if the
cap is not properly closed and loc-
ked.
EWA11091
Make sure that the fuel tank cap is
properly closed after filling fuel.
Leaking fuel is a fire hazard.
EAU13212
Fuel
Make sure there is sufficient gasoline
in the tank.
EWA10881
Gasoline and gasoline vapors are
extremely flammable. To avoid fires
and explosions and to reduce the
risk of injury when refueling, follow
these instructions.
1. Before refueling, turn off the engi-
ne and be sure that no one is sit-
ting on the vehicle. Never refuel
while smoking, or while in the
vicinity of sparks, open flames, or
other sources of ignition such as
the pilot lights of water heaters
and clothes dryers.
2. Do not overfill the fuel tank. Stop
filling when the fuel reaches the
bottom of the filler tube. Because
fuel expands when it heats up,
heat from the engine or the sun
can cause fuel to spill out of the
fuel tank.
1. Fuel tank filler tube
2. Maximum fuel level
3. Wipe up any spilled fuel imme-
diately. NOTICE: Immediately
wipe off spilled fuel with a cle-
an, dry, soft cloth, since fuel
may deteriorate painted surfa-
ces or plastic parts.
[ECA10071]
4. Be sure to securely close the fuel
tank cap.
EWA15151
Gasoline is poisonous and can cau-
se injury or death. Handle gasoline
with care. Never siphon gasoline by
mouth. If you should swallow some
gasoline or inhale a lot of gasoline
WARNING
WARNING
WARNING
INSTRUMENT AND CONTROL FUNCTIONS
3-14
3
ECAS0040
The following warning lights and
indicator lights should come on for
a few seconds, then go off.
Neutral indicator light
Turn signal indicator light
High beam indicator light
Engine trouble warning light
Coolant temperature warning
light
Immobilizer system indicator
light
ABS warning light (for ABS
model)
If a warning or indicator light does
not go off, see page 3-4 for the
corresponding warning and indica-
tor light circuit check.
2. Shift the transmission into the
neutral position.
TIP
When the transmission is in the neu-
tral position, the neutral indicator light
should be on, otherwise have a
Yamaha dealer check the electrical
circuit.
3. Start the engine by pushing the
start switch. NOTICE: For maxi-
mum engine life, never accele-
rate hard when the engine is
cold!
[ECA11041]
TIP
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-
serve the battery. Do not crank the
engine more than 10 seconds on any
one attempt.
TIP
The engine is warm when it quickly
responds to the throttle.
EAU16671
Shifting
1. Shift pedal
2. Neutral position
Shifting gears lets you control the
amount of engine power available for
starting off, accelerating, climbing
hills, etc.
The gear positions are shown in the
illustration.
TIP
To shift the transmission into the neu-
tral position, press the shift pedal
down repeatedly until it reaches the
end of its travel, and then slightly rai-
se it.
NOTICE
OPERATION AND IMPORTANT RIDING POINTS
5-2
5
EAUB1561
Engine oil and oil filter
element
The engine oil level should be chec-
ked before each ride. In addition, the
oil must be changed and the oil filter
element replaced at the intervals spe-
cified in the periodic maintenance and
lubrication chart.
To check the engine oil level
1. Place the vehicle on a level surfa-
ce and hold it in an upright posi-
tion.
TIP
Make sure that the vehicle is positio-
ned straight up when checking the oil
level. A slight tilt to the side can result
in a false reading.
2. Start the engine, warm it up for
10–15 minutes, and then turn it
off.
3. Remove the oil filler cap, wipe the
dipstick clean, insert it back into
the oil filler hole (without scre-
wing it in), and then remove it
again to check the oil level.
TIP
The engine oil tank is located
inside of the frame.
The engine oil should be between
the minimum and maximum level
marks.
1. Engine oil filler cap
2. Maximum level mark
3. Minimum level mark
EWA10361
Never remove the engine oil tank
cap after high-speed operation,
otherwise hot engine oil could
spout out and cause damage or
injury. Always let the engine oil cool
down sufficiently before removing
the oil tank cap.
4. If the engine oil is below the mini-
mum level mark, add sufficient oil
of the recommended type to rai-
se it to the correct level. NOTICE:
Do not operate the vehicle until
you know that the engine oil
level is sufficient.
[ECA10011]
5. Install the oil filler cap.
To change the engine oil (with or
without oil filter element
replacement)
1. Start the engine, warm it up for
several minutes, and then turn it
off.
2. Remove the engine guard by
removing the screws.
1. Screw
2. Engine guard
WARNING
PERIODIC MAINTENANCE AND ADJUSTMENT
6-11
6
EAU20070
Coolant
The coolant level should be checked
before each ride. In addition, the coo-
lant must be changed at the intervals
specified in the periodic maintenance
and lubrication chart.
EAU20253
To check the coolant level
1. Place the vehicle on a level surface
and hold it in an upright position.
TIP
The coolant level must be chec-
ked on a cold engine since the
level varies with engine tempera-
ture.
Make sure that the vehicle is
positioned straight up when
checking the coolant level. A
slight tilt to the side can result in
a false reading.
2. Check the coolant level in the
coolant reservoir.
TIP
The coolant should be between the
minimum and maximum level marks.
1. Coolant reservoir
2. Maximum level mark
3. Minimum level mark
4. Coolant reservoir cap
3. If the coolant is at or below the
minimum level mark, remove
panel E (See page 6-8). , remove
the reservoir cap, add coolant to
the maximum level mark, and
then install the reservoir cap and
the panel. WARNING! Remove
only the coolant reservoir cap.
Never attempt to remove the
radiator cap when the engine is
hot.
[EWA15161]
NOTICE: If coolant is not avai-
lable, use distilled water or soft
tap water instead. Do not use
hard water or salt water since it
is harmful to the engine. If
water has been used instead of
coolant, replace it with coolant
as soon as possible, otherwise
the cooling system will not be
protected against frost and
corrosion. If water has been
added to the coolant, have a
Yamaha dealer check the anti-
freeze content of the coolant
as soon as possible, otherwise
the effectiveness of the coolant
will be reduced.
[ECA10472]
Coolant reservoir capacity (up to
the maximum level mark):
0.50 L (0.53 US qt, 0.44 Imp.qt)
PERIODIC MAINTENANCE AND ADJUSTMENT
6-14
6
EAUS1930
Replacing the fuses
To replace the fuses (XT660Z):
The main fuse and fuse box 1 (for
individual circuits) are located under
the seat. (See page 3-16).
1. Main fuse
2. Spare main fuse1. Fuse box 1
2. Parking lighting fuse
3. Signaling system fuse
4. Headlight fuse
5. Ignition fuse
6. ECU fuse
7. Radiator fan fuse
8. Backup fuse
9. Spare fuseTo replace the fuses (XT660ZA):
The main fuse and fuse box 1 (for
ABS model only),which are in a diffe-
rent and hard-to-reach location, must
be replaced by a Yamaha dealer.
Fuse box 2 (for ABS model only) and
fuse box 3 (for individual circuits) are
located under the seat. (See page
3-16).
To access fuse box 2, pull it upward
and then open it.
1. Fuse box 2
2. ABS control unit fuse
3. Spare fuse
4. Fuse box 3
5. Parking lighting fuse
6. Signaling system fuse
7. Headlight fuse
8. Ignition fuse
9. ECU fuse
10. Radiator fan fuse
11. Backup fuse
12. Spare fuse
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. WARNING! Do not
use a fuse of a higher ampera-
ge rating than recommended
to avoid causing extensive
damage to the electrical sys-
tem and possibly a fire.
[EWA15131]
PERIODIC MAINTENANCE AND ADJUSTMENT
6-31
6
PERIODIC MAINTENANCE AND ADJUSTMENT
6-33
6
1. Headlight bulb holder
2. Headlight bulb
2. Unhook the headlight bulb hol-
der, and then remove the defecti-
ve bulb.
1. Do not touch the glass part of the bulb.
EWA10790
Headlight bulbs get very hot. The-
refore, keep flammable products
away from a lit headlight bulb, and
do not touch the bulb until it has
cooled down.
3. Place a new headlight bulb into
position, and then secure it with
the bulb holder.
4. Connect the coupler, and then
install the headlight bulb cover.
5. Have a Yamaha dealer adjust the
headlight beam if necessary.
EAU24181
Tail/brake light
This model is equipped with an LED-
type tail/brake light.
If the tail/brake light does not come
on, have a Yamaha dealer check it.WARNING
4. To prevent corrosion, it is recom-
mended to apply a corrosion pro-
tection spray on all metal, inclu-
ding chrome- and nickel-plated,
surfaces.
5. Use spray oil as a universal clea-
ner 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 comple-
tely before storing or covering it.
EWA11131
Contaminants on the brakes or
tires can cause loss of control.
Make sure that there is no oil or
wax on the brakes or tires.
If necessary, clean the brake
discs and brake linings with a
regular brake disc cleaner or
acetone, and wash the tires
with warm water and a mild
detergent. Before riding at hig-
her speeds, test the motorcy-
cle’s braking performance and
cornering behavior.
ECA10800
Apply spray oil and wax spa-
ringly and make sure to wipe
off any excess.
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 wear
away the paint.
TIP
Consult a Yamaha dealer for
advice on what products to use.
Washing, rainy weather or humid
climates can cause the headlight
lens to fog. Turning the headlight
on for a short period of time will
help remove the moisture from
the lens.
EAUM1902
Storage
Short-term
Always store your motorcycle in a
cool, dry place and, if necessary, pro-
tect it against dust with a porous
cover. Be sure the engine and the
exhaust system are cool before cove-
ring the motorcycle.
ECA10810
Storing the motorcycle in a
poorly ventilated room or cove-
ring it with a tarp, while it is still
wet, will allow water and humi-
dity 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
several months:
1. Follow all the instructions in the
“Care” section of this chapter.
2. Fill up the fuel tank and add fuel
NOTICE
NOTICE
WARNING
MOTORCYCLE CARE AND STORAGE
7-3
7
Rear brake:Type:
Single disc brake
Operation:
Right foot operation
Recommended fluid:
DOT 4
Front suspension:Type:
Telescopic fork
Spring/shock absorber type:
Coil spring/oil damper
Wheel travel:
XT660Z 210.0 mm (8.26 in)
XT660ZA 160.0 mm (6.30 in)
Rear suspension:Type:
Swingarm (link suspension)
Spring/shock absorber type:
Coil spring/gas-oil damper
Wheel travel:
XT660Z 200.0 mm (7.87 in)
XT660ZA 145.0 mm (5.71 in)
Electrical system:Ignition system:
TCI
Charging system:
AC magneto
Battery:Model:
GT9B-4
Voltage, capacity:
12 V, 8.0 Ah
Headlight:Bulb type:
Halogen bulb
Bulb voltage, wattage x quantity:Low beam headlight:
12 V, 55.0 W x 1
High beam headlight:
12 V, 55.0 W x 1
Tail/brake light:
LED
Front turn signal light:
12 V, 10.0 W x 2
Rear turn signal light:
12 V, 10.0 W x 2
Auxiliary light:
12 V, 5.0 W x 2
Meter lighting:
LED (backlight)
Neutral indicator light:
LED
High beam indicator light:
LED
Turn signal indicator light:
LED
Coolant temperature warning light:
LED
Engine trouble warning light:
LED
ABS warning light (for ABS models):
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
ABS control unit fuse (for ABS models):
5.0 A
ABS motor fuse (for ABS models):
30.0 A
ABS solenoid fuse (for ABS models):
20.0 A
SPECIFICATIONS
8-3
8