fuel YAMAHA XT660Z 2010 User Guide
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Page 42 of 100

EAU17101
0-1000 km (0-600 mi)
Avoid prolonged operation above
4500 r/min. NOTICE: After 1000 km
(600 mi) of operation, the engine oil
must be changed, and the oil filter
element replaced.
1000-1600 km (600-1000 mi)
Avoid prolonged operation above
6000 r/min.
1600 km (1000 mi) and beyond
The vehicle can now be operated nor-
mally.
ECA10310NOTICE
Keep the engine speed out of
the tachometer red zone.
If any engine trouble should oc-
cur during the engine break-in
period, immediately have a
Yamaha dealer check the
vehicle.
EAU17213
Parking
When parking, stop the engine, and
then remove the key from the main
switch.
EWA10311
WARNING0
Since the engine and exhaust
system can become very hot,
park in a place where pedestri-
ans or children are not likely to
touch them and be burned.
Do not park on a slope or on
soft ground, otherwise the ve-
hicle may overturn, increasing
the risk of a fuel leak and fire.
Do not park near grass or other
flammable materials which
might catch fire.
OPERATION AND IMPORTANT RIDING POINTS
6-4
6
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PERIODIC MAINTENANCE AND ADJUSTMENT
EAU46861
TIP
●The annual checks must be performed every year, except if a kilometer-based maintenance, or for the UK, a
mileage-based maintenance, is performed instead.
●From 50000 km (30000 mi), repeat the maintenance intervals starting from 10000 km (6000 mi).
●Items marked with an asterisk should be performed by a Yamaha dealer as they require special tools, data and tech-
nical skills.
EAU46910Periodic maintenance chart for the emission control system
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NO. ITEM CHECK OR MAINTENANCE JOB
ODOMETER READING
1000 km 10000 km 20000 km 30000 km 40000 km(600 mi) (6000 mi) (12000 mi) (18000 mi) (24000 mi)
ANNUAL
CHECK
√√ √√ √
√√
√√
√√
√√√ √√ √
√√√ √√
√√ √√ √1✻
2
3
✻
4✻
5✻
6✻
Check fuel hoses for cracks or damage.
Check condition.
Clean and regap.
Replace.
Check valve clearance.
Adjust.
Adjust engine idling speed.
Check the screw clamp(s) for
looseness.
Check the air cut-off valve, reed valve,
and hose for damage.
Replace any damaged parts if necessary. Fuel line
Spark plug
Valves
Fuel injection
Muffler and exhaust
pipe
Air induction system
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Page 58 of 100

PERIODIC MAINTENANCE AND ADJUSTMENT
7-16
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EAU21631
Tires
To maximize the performance, durabil-
ity, and safe operation of your motor-
cycle, note the following points regard-
ing the specified tires.
Tire air pressure
The tire air pressure should be
checked and, if necessary, adjusted
before each ride.
EWA10501
WARNING0
Operation of this vehicle with im-
proper tire pressure may cause se-
vere injury or death from loss of
control.
●The tire air pressure must be
checked and adjusted on cold
tires (i.e., when the tempera-
ture of the tires equals the am-
bient temperature).
●The tire air pressure must be
adjusted in accordance with
the riding speed and with the
total weight of rider, passenger,
cargo, and accessories ap-
proved for this model.
EAU21382
Checking the throttle cable
free play
1. Throttle cable free play
The throttle cable free play should
measure 3.0-5.0 mm (0.12-0.20 in) at
the throttle grip. Periodically check the
throttle cable free play and, if neces-
sary, have a Yamaha dealer adjust it.
EAU21401
Valve clearance
The valve clearance changes with
use, resulting in improper air-fuel mix-
ture and/or engine noise. To prevent
this from occurring, the valve clear-
ance must be adjusted by a Yamaha
dealer at the intervals specified in the
periodic maintenance and lubrication
chart.
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Page 74 of 100

PERIODIC MAINTENANCE AND ADJUSTMENT
7-32
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ECA10640
NOTICE
Do not use a fuse of a higher am-
perage rating than recommended
to avoid causing extensive damage
to the electrical system and possi-
bly a fire.
3. Turn the key to “ON” and turn on
the electrical circuit in question to
check if the device operates.
4. If the fuse immediately blows
again, have a Yamaha dealer
check the electrical system.
1. Parking lighting fuse
2. Signaling system fuse
3. Headlight fuse
4. Ignition fuse
5. Electronic fuel injection fuse
6. Radiator fan fuse
7. Backup fuse
8. Reserve fuses
The main fuse and fuse box are locat-
ed under the seat. (See page 7-31.)
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.
7
8
654321Specified fuses:
Main fuse:
30 A
Parking lighting fuse:
10 A
Signalling system fuse:
10 A
Headlight fuse:
20 A
Ignition fuse:
10 A
Fuel injection system fuse:
10 A
Radiator fan fuse:
7.5 A
Backup fuse (for odometer,
clock and immobilizer):
10 A
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PERIODIC MAINTENANCE AND ADJUSTMENT
7-39
TIP
●Make sure that the slot in the
brake caliper bracket is fit over the
retainer on the swingarm.
●Make sure that there is enough
space between the brake pads
before installing the wheel.
2. Install the drive chain onto the
rear sprocket.
3. Install the axle nut, and then low-
er the rear wheel so that it is on
the ground.
4. Adjust the drive chain slack. (See
page 7-24.)
5. Apply the rear brake several
times, and then tighten the axle
nut to the specified torque.
Tightening torque:
Axle nut:
105 Nm (10.5 m·kgf, 75 ft·lbf)
EAU25871
Troubleshooting
Although Yamaha motorcycles receive
a thorough inspection before shipment
from the factory, trouble may occur
during 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
inferior, have a shorter service life and
can lead to expensive repair bills.
EWA15141
WARNING0
When checking the fuel system, do
not smoke, and make sure there
are no open flames or sparks in the
area, including pilot lights from wa-
ter heaters or furnaces. Gasoline or
gasoline vapors can ignite or ex-
plode, causing severe injury or
property damage.
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PERIODIC MAINTENANCE AND ADJUSTMENT
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EAU42131Troubleshooting charts
Starting problems or poor engine performance
1. Fuel
2. Compression
3. Ignition
4. Battery
Check the fuel level in the
fuel tank.
Operate the electric
starter.
Remove the spark plug
and check the electrodes.
Operate the electric
starter.
There is enough
fuel.
There is
compression.
Wet.
The engine turns
over quickly.
There is no fuel.
There is no
compression.
Dry.
The engine turns
over slowly.
Check the
compression.
Check the ignition.
Wipe off with a dry cloth and correct
the spark plug gap, or replace the
spark plug.
The battery is good.
Have a Yamaha dealer check the
vehicle.
Check the battery lead connections,
and charge the battery if necessary.
Operate the electric starter.
The engine does not start.
Check the battery.
The engine does
not start. Have a
Yamaha dealer
check the vehicle.
Supply fuel.
Have a Yamaha dealer check
the vehicle.
The engine does not start.
Check the compression.
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Page 84 of 100

MOTORCYCLE CARE AND STORAGE
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EAU26004
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 mo-
torcycle. 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 cov-
ers as well as all electrical cou-
plers 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, sprockets,
the drive chain and wheel axles. Al-
ways rinse the dirt and degreaser
off with water.
Cleaning
ECA10772
NOTICE
●Avoid using strong acidic
wheel cleaners, especially on
spoked wheels. If such prod-
ucts are used on hard-to-re-
move dirt, do not leave the
cleaner on the affected area
any longer than instructed. Al-
so, thoroughly rinse the area
off with water, immediately dry
it, and then apply a corrosion
protection spray.
●Improper cleaning can damage
plastic parts (such as cowlings,
panels, windshields, headlight
lenses, meter lenses, etc.) and
the mufflers. Use only a soft,
clean cloth or sponge with wa-ter to clean plastic. However, if
the plastic parts cannot be
thoroughly cleaned with water,
diluted mild detergent with wa-
ter may be used. Be sure to
rinse off any detergent residue
using plenty of water, as it is
harmful to plastic parts.
●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 abrasive
cleaning products, solvent or
thinner, fuel (gasoline), rust re-
movers or inhibitors, brake flu-
id, antifreeze or electrolyte.
●Do not use high-pressure
washers or steam-jet cleaners
since they cause water seep-
age and deterioration in the fol-
lowing areas: seals (of wheel
and swingarm bearings, fork
and brakes), electric compo-
nents (couplers, connectors,
instruments, switches and
lights), breather hoses and
vents.
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Page 87 of 100

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MOTORCYCLE CARE AND STORAGE
8-4
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
protect 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
sparking 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! Toprevent damage or injury
from sparking, make sure to
ground the spark plug elec-
trodes while turning the en-
gine over.
4. Lubricate all control cables and
the pivoting points of all levers
and pedals as well as of the side-
stand/centerstand.
5. Check and, if necessary, correct
the tire air pressure, and then lift
the motorcycle so that both of its
wheels are off the ground. Alter-
natively, turn the wheels a little
every month in order to prevent
the tires from becoming degraded
in one spot.
6. Cover the muffler outlets with
plastic bags to prevent moisture
from entering them.7. Remove the battery and fully
charge it. Store it in a cool, dry
place and charge it once a month.
Do not store the battery in an ex-
cessively cold or warm place [less
than 0 °C (30 °F) or more than 30
°C (90 °F)]. For more information
on storing the battery, see
page 7-31.
TIP
Make any necessary repairs before
storing the motorcycle.
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Page 88 of 100

SPECIFICATIONS
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Engine oil:Type:
SAE10W30 or SAE10W40 or SAE15W40
or 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) (2.19 Imp.qt)
With oil filter element replacement:
2.60 L (2.73 US qt) (2.26 Imp.qt)
Total amount (dry engine):
2.90 L (3.07 US qt) (2.55 Imp.qt)
Cooling system:Radiator capacity (including all routes):
1.2 L (1.26 US qt) (1.05 Imp.qt) (Radiator) +
0.5 L (0.52 US qt) (0.44 Imp.qt)
(Coolant reservoir)
Coolant reservoir capacity (up to the
maximum level mark):
0.50 L (0.52 US qt) (0.44 Imp.qt)
From low to full level:
0.30 L (0.32 US qt) (0.26 Imp.qt)
Air filter:Air filter element:
Paper
Fuel:Recommended fuel:
Premium unleaded gasoline only
Fuel tank capacity:
23.0 L (6.07 US gal) (5.06 Imp.gal)
Fuel reserve amount:
6.7 L (1.76 US gal) (1.46 Imp.gal)
Fuel injection:Manufacturer:
DENSO
Model:
297500-0390
Spark plug:Manufacturer/model:NGK/CR7EGap:
0.7-0.8 mm (0.028-0.032 in)
Clutch:Clutch type:
Wet, multiple-disc
Transmission:Primary reduction system:
Spur gear
Primary reduction ratio:
75/36 (2.083)
Secondary reduction system:
Chain drive
Secondary reduction ratio:
45/15 (3.00)
Transmission type:
Constant mesh 5-speed
Dimensions:Overall length:
2246 mm (88.42 in)
Overall width:
864 mm (34.01 in)
Overall height:
1477 mm (58.14 in)
Seat height:
896 mm (35.27 in)
Wheelbase:
1500 mm (59.05 in)
Ground clearance:
260 mm (10.23 in)
Minimum turning radius:
1958 mm (77.08 in)
Basic weight:With oil and fuel:
208.5 kg (459 lb)
Engine:Engine type:
Liquid cooled 4-stroke, SOHC
Cylinder arrangement:
Forward-inclined single cylinder
Displacement:
660.0 cm
3(40.27 cu.in)
Bore x stroke:
100.0 x 84.0 mm (3.94 x 3.31 in)
Compression ratio:
10.00 : 1
Starting system:
Electric starter
Lubrication system:
Dry sump
-20-10 0 1020304050°C
SAE 10W-30
SAE 10W-40
SAE 20W-40
SAE 20W-50
SAE 15W-40
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Page 90 of 100

SPECIFICATIONS
9-3
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Rear suspension:
Type:
Swingarm (link suspension)
Spring/damper type:
Coil spring/gas-oil damper, spring
preload adjustable
Wheel travel:
200 mm (7.87 in)
Electrical system:
Ignition system:
Transistorized coil ignition (digital)
Charging system:
A.C. magneto
Battery:
Model:
GT9B-4
Voltage, capacity:
12 V, 8 Ah
Headlight:
Bulb type:
Halogen bulb
Bulb voltage, wattage x quantity:Headlight:
12 V, 55 W x 2
Auxiliary light:
12 V, 5 W x 2
Tail/brake light:
LED
Front turn signal light:
12 V, 10 W x 2
Rear turn signal light:
12 V, 10 W x 2
Meter lighting:
LED (backlight)Neutral indicator light:
LED
Turn signal indicator light:
LED
High beam indicator light:
LED
Coolant temperature warning light:
LED
Engine trouble warning light:
LED
Immobilizer system indicator light:
LED
Fuses:Main fuse:
30 A
Headlight fuse:
20 A
Signaling system fuse:
10 A
Ignition fuse:
10 A
Parking lighting fuse:
10 A
Radiator fan fuse:
7.5 A
Fuel injection system fuse:
10 A
Backup fuse (for odometer, clock and
immobilizer):
10 A
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