Page 6 of 98

TABLE OF CONTENTSSAFETY INFORMATION.................. 1-1
DESCRIPTION.................................. 2-1
Left view ......................................... 2-1
Right view ....................................... 2-3
Controls and instruments ............... 2-5
INSTRUMENT AND CONTROL
FUNCTIONS...................................... 3-1
Immobilizer system......................... 3-1
Main switch/steering lock............... 3-2
Indicator lights and warning
lights............................................ 3-4
Multi-function display ..................... 3-6
Handlebar switches ........................ 3-9
Clutch lever .................................. 3-10
Shift pedal .................................... 3-11
Brake lever.................................... 3-11
Brake pedal .................................. 3-11
ABS (for ABS models) .................. 3-12
Fuel tank cap ................................ 3-13
Fuel ............................................... 3-13
Fuel tank breather/overflow
hose .......................................... 3-15
Catalytic converter ....................... 3-15
Seat .............................................. 3-16
Adjusting the front fork ................. 3-16
Adjusting the shock absorber
assembly ................................... 3-18
Sidestand ..................................... 3-19
Ignition circuit cut-off system ....... 3-19FOR YOUR SAFETY –
PRE-OPERATION CHECKS............. 4-1
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
ADJUSTMENT................................... 6-1
Owner’s tool kit ............................... 6-2
Periodic maintenance chart for the
emission control system .............. 6-3
General maintenance and
lubrication chart ........................... 6-4
Removing and installing panels ...... 6-8
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..... 6-14
Adjusting the engine idling
speed ......................................... 6-16
Checking the throttle grip free
play ............................................ 6-16
Valve clearance ............................. 6-17
Tires .............................................. 6-17Spoke 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 ...... 6-21
Changing the brake fluid .............. 6-23
Drive chain slack........................... 6-23
Cleaning and lubricating the drive
chain.......................................... 6-24
Checking and lubricating the
cables ........................................ 6-25
Checking and lubricating the
throttle grip and cable ............... 6-25
Checking and lubricating the
brake and clutch levers ............. 6-26
Checking and lubricating the
brake pedal ............................... 6-26
Checking and lubricating the
sidestand................................... 6-27
Lubricating the rear suspension ... 6-27
Lubricating the swingarm
pivots......................................... 6-27
Checking the front fork ................. 6-28
Checking the steering................... 6-28
Checking the wheel bearings ....... 6-29
Battery .......................................... 6-29
Replacing the fuses ...................... 6-31
Replacing a headlight bulb ........... 6-32
Replacing an auxiliary light bulb ... 6-34
Tail/brake light .............................. 6-34U2BDE1E0.book Page 1 Tuesday, December 16, 2014 5:38 PM
Page 13 of 98
DESCRIPTION
2-1
2
EAU32221
Left viewXT660Z1. Idle adjusting screw (page 6-16)
2. Owner’s tool kit (page 6-2)
3. Air filter element (page 6-14)
4. Fuse box 1 (page 6-31)
5. Seat lock (page 3-16)
6. Shock absorber assembly spring preload adjusting ring (page 3-18)
7. Shift pedal (page 3-11)8. Engine oil drain bolt (crankcase) (page 6-10)
9. Engine oil drain bolt (oil tank) (page 6-10)
U2BDE1E0.book Page 1 Tuesday, December 16, 2014 5:38 PM
Page 14 of 98
DESCRIPTION
2-2
2XT660ZA
123456
7 8 10 9 11
1. Main fuse (page 6-31)
2. Fuse box 1 (page 6-31)
3. Idle adjusting screw (page 6-16)
4. Fuse box 2 (page 6-31)
5. Fuse box 3 (page 6-31)
6. Seat lock (page 3-16)
7. Shock absorber assembly spring preload adjusting ring (page 3-18)
8. Shift pedal (page 3-11)
9. Engine oil drain bolt (crankcase) (page 6-10)10.Engine oil drain bolt (oil tank) (page 6-10)
11.Front wheel hubU2BDE1E0.book Page 2 Tuesday, December 16, 2014 5:38 PM
Page 15 of 98
DESCRIPTION
2-3
2
EAU32231
Right viewXT660Z
1
2
3
4
5
6
7
8
9
1. Grab bar
2. Main fuse (page 6-31)
3. Battery (page 6-29)
4. Rear brake fluid reservoir (page 6-21)
5. Coolant reservoir (page 6-13)
6. Front brake fluid reservoir (page 6-21)
7. Coolant drain bolt (page 6-14)8. Engine oil filter element (page 6-10)
9. Brake pedal (page 3-11)
U2BDE1E0.book Page 3 Tuesday, December 16, 2014 5:38 PM
Page 16 of 98
DESCRIPTION
2-4
2XT660ZA
12 3 4 5 6
7 8 9 10
1. Rear brake fluid reservoir (page 6-21)
2. Fuse box 2 (page 6-31)
3. Owner’s tool kit (page 6-2)
4. Coolant reservoir (page 6-13)
5. Battery (page 6-29)
6. Front brake fluid reservoir (page 6-21)
7. Coolant drain bolt (page 6-14)
8. Engine oil filter element (page 6-10)
9. Brake pedal (page 3-11)10.Rear wheel hubU2BDE1E0.book Page 4 Tuesday, December 16, 2014 5:38 PM
Page 75 of 98

PERIODIC MAINTENANCE AND ADJUSTMENT
6-31
6
EAUS1934
Replacing the fusesTo replace the fuses (XT660Z):
The main fuse and fuse box 1 (for indi-
vidual circuits) are located under the
seat. (See page 3-16.)
To replace the fuses (XT660ZA):
The main fuse and fuse box 1 (for ABS
model only), which are in a different
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.
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. WARNING! Do not1. Main fuse
2. Spare main fuse
1. Fuse box 1
2. Parking lighting fuse
3. Signaling system fuse
4. Headlight fuse
5. Ignition fuse
6. ECU fuse
7. Radiator fan motor fuse
8. Backup fuse
9. Spare fuseZAUM1269
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 motor fuse
11.Backup fuse
2
34567
1SPA RE
SPA RE SPA RE
ZAUM1247
U2BDE1E0.book Page 31 Tuesday, December 16, 2014 5:38 PM
Page 76 of 98
![YAMAHA XT660Z 2015 Owners Manual PERIODIC MAINTENANCE AND ADJUSTMENT
6-32
6use a fuse of a higher amperage
rating than recommended to
avoid causing extensive dam-
age to the electrical system and
possibly a fire.
[EWA15132]
3. Turn YAMAHA XT660Z 2015 Owners Manual PERIODIC MAINTENANCE AND ADJUSTMENT
6-32
6use a fuse of a higher amperage
rating than recommended to
avoid causing extensive dam-
age to the electrical system and
possibly a fire.
[EWA15132]
3. Turn](/manual-img/51/53212/w960_53212-75.png)
PERIODIC MAINTENANCE AND ADJUSTMENT
6-32
6use a fuse of a higher amperage
rating than recommended to
avoid causing extensive dam-
age to the electrical system and
possibly a fire.
[EWA15132]
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.
EAUB1583
Replacing a headlight bulbThis model is equipped with halogen
bulb headlights. If a headlight bulb
burns out, replace it as follows.NOTICE
ECA10651
Take care not to damage the follow-
ing parts:
Headlight bulb
Do not touch the glass part of
the headlight bulb to keep it free
from oil, otherwise the transpar-
ency of the glass, the luminosity
of the bulb, and the bulb life will
be adversely affected. Thor-
oughly clean off any dirt and fin-
gerprints on the headlight bulb
using a cloth moistened with al-
cohol or thinner.
Headlight lens
Do not affix any type of tinted
film or stickers to the headlight
lens.
Do not use a headlight bulb of a
wattage higher than specified.
Specified fuses:
Main fuse:
30.0 A
Parking lighting fuse:
10.0 A
Signaling system fuse:
10.0 A
Headlight fuse:
20.0 A
Ignition fuse:
10.0 A
Fuel injection system fuse:
10.0 A
Radiator fan motor fuse:
7.5 A
Backup fuse:
10.0 A
ABS motor fuse:
XT660ZA 30.0 A
ABS solenoid fuse:
XT660ZA 20.0 A
ABS control unit fuse:
XT660ZA 5.0 A
U2BDE1E0.book Page 32 Tuesday, December 16, 2014 5:38 PM
Page 92 of 98

SPECIFICATIONS
8-3
8
Rear brake:Type:
Single disc brake
Operation:
Right foot operation
Specified brake fluid:
DOT 4Front suspension:Type:
Telescopic fork
Spring/shock absorber type:
Coil spring/oil damper
Wheel travel:
XT660Z 210 mm (8.3 in)
XT660ZA 160 mm (6.3 in)Rear suspension:Type:
Swingarm (link suspension)
Spring/shock absorber type:
Coil spring/gas-oil damper
Wheel travel:
XT660Z 200 mm (7.9 in)
XT660ZA 145 mm (5.7 in)Electrical system:Ignition system:
TCI
Charging system:
AC magnetoBattery:Model:
XT660Z GT9B-4
XT660ZA YTZ10SVoltage, capacity:
XT660Z 12 V, 8.0 Ah
XT660ZA 12 V, 8.6 Ah
Headlight:Bulb type:
Halogen bulbBulb voltage, wattage × quantity:Headlight:
12 V, 55.0 W × 2
Tail/brake light:
LED
Front turn signal light:
12 V, 10.0 W × 2
Rear turn signal light:
12 V, 10.0 W × 2
Auxiliary light:
12 V, 3.0 W × 2
License plate light:
12 V, 5.0 W × 1
Meter lighting:
LED
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:
XT660ZA LEDImmobilizer 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 motor fuse:
7.5 A
Fuel injection system fuse:
10.0 A
ABS control unit fuse:
XT660ZA 5.0 A
ABS motor fuse:
XT660ZA 30.0 A
ABS solenoid fuse:
XT660ZA 20.0 A
Backup fuse:
10.0 A
U2BDE1E0.book Page 3 Tuesday, December 16, 2014 5:38 PM