TABLE OF CONTENTS
SAFETY INFORMATION
.................. 1-1
Further safe-riding points ................ 1-5
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
Speedometer .................................. 3-5
Tachometer .................................... 3-5
Multi-function display ...................... 3-5
Anti-theft alarm (optional) ............... 3-9
Handlebar switches ...................... 3-10
Front brake lever .......................... 3-11
Rear brake lever ........................... 3-12
Rear brake lock lever .................... 3-12
ABS (for ABS models) .................. 3-13
Fuel tank cap ................................ 3-14
Fuel ............................................... 3-15
Catalytic converters ...................... 3-16
Seats ............................................ 3-17
Adjusting the rider seat ................. 3-18
Storage compartments ................. 3-19
Adjusting the shock absorber
assemblies ................................ 3-21
Sidestand ...................................... 3-21Ignition circuit cut-off system ........ 3-22
FOR YOUR SAFETY –
PRE-OPERATION CHECKS
............. 4-1
OPERATION AND IMPORTANT
RIDING POINTS
................................. 5-1
Starting the engine ......................... 5-1
Starting off ...................................... 5-2
Acceleration and deceleration ........ 5-2
Braking ........................................... 5-3
Tips for reducing fuel
consumption ............................... 5-3
Engine break-in .............................. 5-4
Parking ........................................... 5-4
PERIODIC MAINTENANCE AND
ADJUSTMENT
................................... 6-1
Owner’s tool kit ............................... 6-1
Periodic maintenance chart for
the emission control system ....... 6-3
General maintenance and
lubrication chart .......................... 6-4
Removing and installing
cowlings and panels ................... 6-7
Checking the spark plug ............... 6-10
Engine oil and oil filter
element ..................................... 6-12
Final transmission oil .................... 6-15
Coolant ......................................... 6-16Air filter elements and check
hoses and V-belt case air
filter element ............................. 6-17
Checking the throttle cable free
play ........................................... 6-20
Valve clearance ........................... 6-20
Tires ............................................. 6-21
Cast wheels ................................. 6-22
Front and rear brake lever free
play ........................................... 6-23
Adjusting the rear brake lock
lever cable ................................ 6-24
Checking the front and rear
brake pads ................................ 6-24
Checking the brake fluid level ...... 6-25
Changing the brake fluid .............. 6-26
Checking and lubricating the
cables ....................................... 6-26
Checking and lubricating the
throttle grip and cable ............... 6-27
Lubricating the front and rear
brake levers .............................. 6-27
Checking and lubricating the
centerstand and sidestand ....... 6-28
Checking the front fork ................. 6-28
Checking the steering .................. 6-29
Checking the wheel bearings ....... 6-29
Battery .......................................... 6-30
Replacing the fuses ..................... 6-31
Replacing a headlight bulb .......... 6-33
Tail/brake light .............................. 6-34
INSTRUMENT AND CONTROL FUNCTIONS
3-2
2
34
5
6
7
8
9 as they may cause signal inter-
ference.
EAU10472
Main switch/steering lock
The main switch/steering lock controls
the ignition and lighting systems, and is
used to lock the steering. The various
positions are described below.
TIP
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.
EAU34121
ON
All electrical circuits are supplied with
power; the meter lighting, taillight, li-cense plate light and auxiliary lights
come on, and the engine can be start-
ed. The key cannot be removed.
TIP
The headlights come on automatically
when the engine is started and stay on
until the key is turned to “OFF” or the
sidestand is moved down.
EAU10661
OFF
All electrical systems are off. The key
can be removed.
WARNING
EWA10061
Never turn the key to “OFF” or
“LOCK” while the vehicle is moving.
Otherwise the electrical systems will
be switched off, which may result in
loss of control or an accident.
EAU10683
LOCK
The steering is locked, and all electrical
systems are off. The key can be re-
moved.
INSTRUMENT AND CONTROL FUNCTIONS
3-3
1
2
3
4
5
6
7
8
9
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.
To unlock the steeringPush the key in, and then turn it to
“OFF” while still pushing it.
EAU10941
(Parking)
The steering is locked, and the taillight,
license plate light and auxiliary lights
are on. The hazard lights and turn sig-
nal lights can be turned on, but all other
electrical systems are off. The key can
be removed.
The steering must be locked before the
key can be turned to “ ”.
NOTICE
ECA11020
Do not use the parking position for
an extended length of time, other-
wise the battery may discharge.
EAU11004
Indicator and warning lights
EAU11030
Turn signal indicator lights “” and
“”
The corresponding indicator light flash-
es when the turn signal switch is
pushed to the left or right.
EAU11080
High beam indicator light “”
This indicator light comes on when thehigh beam of the headlight is switched
on.
EAU43023
Engine trouble warning light “”
This warning light comes on if an elec-
trical circuit monitoring the engine is not
working correctly. If this occurs, have a
Yamaha dealer check the self-diagno-
sis system.
The electrical circuit of the warning light
can be checked by turning the key to
“ON”. The warning light should come
on for a few seconds, and then go off.
If the warning light does not come on
initially when the key is turned to “ON”,
or if the warning light remains on, have
a Yamaha dealer check the electrical
circuit.
TIP
This warning light will come on when
the key is turned to “ON” and the start
switch is pushed, but this does not indi-
cate a malfunction.
1. Turn signal indicator lights “ ” and “ ”
2. High beam indicator light “ ”
3. Immobilizer system indicator light
4. Engine trouble warning light “ ”
5. Anti-lock Brake System (ABS) warning
light “ ” (for ABS models)
123
4
5
ABS
INSTRUMENT AND CONTROL FUNCTIONS
3-4
2
34
5
6
7
8
9
EAU43032
ABS warning light “” (for ABS
models)
NOTICE
ECA10831
If the ABS warning light comes on or
flashes while riding, the ABS may
not work correctly. If this occurs,
have a Yamaha dealer check the
electrical circuit.
See page 3-13 for an explanation of the
ABS.
The electrical circuit of the warning light
can be checked by setting the engine
stop switch to “” and turning the key
to “ON”. The warning light should come
on for a few seconds, and then go off.
If the warning light does not come on
initially when the key is turned to “ON”,
or if the warning light remains on, have
a Yamaha dealer check the electrical
circuit.
WARNING
EWA11350
When the ABS warning light comes
on or flashes while riding, the brake
system reverts to conventional brak-
ing. Therefore, be careful not tocause the wheel to lock during emer-
gency braking.
TIP
The ABS warning light may come on
while accelerating the engine with the
scooter on its centerstand, but this
does not indicate a malfunction.
EAU38623
Immobilizer system indicator light
The electrical circuit of the indicator
light can be checked by turning the key
to “ON”. The indicator light should
come on for a few seconds, and then
go off.
If the indicator light does not come on
initially when the key is turned to “ON”,
or if the indicator light remains on, have
a Yamaha dealer check the electrical
circuit.
When the key is turned to “OFF” and 30
seconds have passed, the indicator
light will start flashing indicating the im-
mobilizer system is enabled. After 24
hours have passed, the indicator light
will stop flashing, however the immobi-
lizer system is still enabled.
This model is also equipped with aself-diagnosis device for the immobiliz-
er system. (See page 3-8 for an expla-
nation of the self-diagnosis device.)
ABS
INSTRUMENT AND CONTROL FUNCTIONS
3-10
2
34
5
6
7
8
9
EAU12348
Handlebar switches
LeftRight
EAU12360
Pass switch “PASS”
Press this switch to flash the headlight.
EAU12400
Dimmer switch “/”
Set this switch to “” for the high
beam and to “” for the low beam.
EAU12460
Turn signal switch “/”
To signal a right-hand turn, push this
switch to “”. To signal a left-hand
turn, push this switch to “”. When re-
leased, the switch returns to the centerposition. To cancel the turn signal
lights, push the switch in after it has re-
turned to the center position.
EAU12500
Horn switch “”
Press this switch to sound the horn.
EAU12660
Engine stop switch “/”
Set this switch to “” before starting
the engine. Set this switch to “” to
stop the engine in case of an emergen-
cy, such as when the vehicle overturns
or when the throttle cable is stuck.
EAU12721
Start switch “”
With the sidestand up, push this switch
while applying the front or rear brake to
crank the engine with the starter. See
page 5-1 for starting instructions prior
to starting the engine.
EAU44710
The engine trouble warning light and
ABS warning light (ABS model only)
will come on when the key is turned to
“ON” and the start switch is pushed, but
1. Pass switch “PASS”
2. Dimmer switch “/”
3. Turn signal switch “/”
4. Horn switch “”
1
2
3
4
1. Engine stop switch “/”
2. Hazard switch “”
3. Start switch “”1
2
3
INSTRUMENT AND CONTROL FUNCTIONS
3-13
1
2
3
4
5
6
7
8
9
rear brake lock lever is applied.
To provide secure locking of the
rear wheel, apply the rear brake le-
ver first before moving the rear
brake lock lever to the left.
WARNING
EWA12361
Never move the rear brake lock lever
to the left while the vehicle is mov-
ing, otherwise loss of control or an
accident may result. Make sure that
the vehicle is stopped before mov-
ing the rear brake lock lever to the
left.
EAU12995
ABS (for ABS models)
The Yamaha ABS (Anti-lock Brake
System) features a dual electronic con-
trol system, which acts on the front and
rear brakes independently. The ABS
securely controls wheel lockup during
emergency braking on changing road
surfaces and under various weather
conditions, thereby maximizing tire ad-
hesion and performance while provid-
ing a smooth braking action. The ABS
is monitored by an ECU, which will
have recourse to manual braking if a
malfunction occurs.
WARNING
EWA10090
The ABS performs best on long
braking distances.
On certain (rough or gravel)
roads, the braking distance may
be longer with than without the
ABS. Therefore, always keep a
sufficient distance to the vehi-
cle ahead to match the riding
speed.
TIP
The ABS performs a self-diagno-sis test for a few seconds each
time the vehicle first starts off after
the key was turned to “ON”. During
this test, a “clicking” noise can be
heard from the front of the vehicle,
and if either brake lever is even
slightly applied, a vibration can be
felt at the lever, but these do not in-
dicate a malfunction.
When the ABS is activated, the
brakes are operated in the usual
way. A pulsating action may be felt
at the brake levers, but this does
not indicate a malfunction.
This ABS has a test mode which
allows the owner to experience the
pulsating at the brake levers when
the ABS is operating. However,
special tools are required, so
please consult your Yamaha deal-
er when performing this test.
NOTICE
ECA16120
Keep any type of magnets (including
magnetic pick-up tools, magnetic
screwdrivers, etc.) away from the
front and rear wheel hubs, otherwise
the magnetic rotors equipped in the
INSTRUMENT AND CONTROL FUNCTIONS
3-15
1
2
3
4
5
6
7
8
9
the original position, and then re-
move it.
3. Close the lid.
WARNING
EWA11121
Be sure that the fuel tank cap is
properly installed and locked before
riding the scooter. Leaking fuel is a
fire hazard.
EAU13221
Fuel
Make sure there is sufficient gasoline in
the tank.
WARNING
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 en-
gine and be sure that no one is sit-
ting on the vehicle. Never refuel
while smoking, or while in the vi-
cinity 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. When
refueling, be sure to insert the
pump nozzle into the fuel tank filler
hole. 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.3. Wipe up any spilled fuel immedi-
ately.
NOTICE:
Immediately wipe
off spilled fuel with a clean, dry,
soft cloth, since fuel may deteri-
orate painted surfaces or plastic
parts.
[ECA10071]
4. Be sure to securely close the fuel
tank cap.
WARNING
EWA15151
Gasoline is poisonous and can
cause injury or death. Handle gaso-
line with care. Never siphon gaso-
line by mouth. If you should swallow
some gasoline or inhale a lot of gas-
oline vapor, or get some gasoline in
1. Fuel tank filler tube
2. Maximum fuel level
21
INSTRUMENT AND CONTROL FUNCTIONS
3-20
2
34
5
6
7
8
9
To close the storage compartment,
push the lid into the original position.
WARNING! Do not store heavy items
in this compartment.
[EWA11161]
Rear storage compartment
Two helmets can be stored in the stor-
age compartment under the seats.
(See page 3-17.)
NOTICE
ECA10080
Keep the following points in mind
when using the storage compart-
ment.
Since the storage compartment
accumulates heat when ex-
posed to the sun, do not storeanything susceptible to heat in-
side it.
To avoid humidity from spread-
ing through the storage com-
partment, wrap wet articles in a
plastic bag before storing them
in the compartment.
Since the storage compartment
may get wet while the scooter is
being washed, wrap any articles
stored in the compartment in a
plastic bag.
Do not keep anything valuable
or breakable in the storage com-
partment.
NOTICE
ECA11100
Do not leave the rider seat open for
an extended period of time, other-
wise the light may cause the battery
to discharge.
WARNING
EWA11171
Do not exceed the following loading
limits:
Front storage compartment A:
2 kg (4 lb)
Rear storage compartment: 5 kg
(11 lb)
Maximum load for the vehicle:
YP400 188 kg (414 lb) YP400A
185 kg (408 lb)
1. Rider seat
1