2004 YAMAHA FZ6 N ECU

SAFETY INFORMATION
1-3
1Loading
The total weight of the operator, pas-
senger, accessories and cargo must
not exceed the maximum load limit of
196 kg (432 lb). When loading within
this weight limit, keep the following in
mind:

Cargo and accessory weight
should be kept as low and close to
the motorcycle as possible. Make
sure to distribute the weight as
evenly as possible on both sides of
the motorcycle to minimize imbal-
ance or instability.


Shifting weights can create a sud-
den imbalance. Make sure that ac-
cessories and cargo are securely
attached to the motorcycle before
riding. Check accessory mounts
and cargo restraints frequently.


Never attach any large or heavy
items to the handlebar, front fork,
or front fender. These items, in-
cluding such cargo as sleeping
bags, duffel bags, or tents, can
create unstable handling or a slow
steering response.Accessories
Genuine Yamaha accessories have
been specifically designed for use on
this motorcycle. Since Yamaha cannot
test all other accessories that may be
available, you must personally be re-
sponsible for the proper selection, in-
stallation and use of non-Yamaha
accessories. Use extreme caution
when selecting and installing any ac-
cessories.
Keep the following guidelines in mind,
as well as those provided under “Load-
ing” when mounting accessories.

Never install accessories or carry
cargo that would impair the perfor-
mance of your motorcycle. Care-
fully inspect the accessory before
using it to make sure that it does
not in any way reduce ground
clearance or cornering clearance,
limit suspension travel, steering
travel or control operation, or ob-
scure lights or reflectors.
Accessories fitted to the handle-
bar or the front fork area can
create instability due to improper
weight distribution or aerody-
namic changes. If accessoriesare added to the handlebar or
front fork area, they must be as
lightweight as possible and
should be kept to a minimum.
Bulky or large accessories may
seriously affect the stability of
the motorcycle due to aerody-
namic effects. Wind may at-
tempt to lift the motorcycle, or
the motorcycle may become un-
stable in cross winds. These ac-
cessories may also cause
instability when passing or being
passed by large vehicles.
Certain accessories can dis-
place the operator from his or
her normal riding position. This
improper position limits the free-
dom of movement of the opera-
tor and may limit control ability,
therefore, such accessories are
not recommended.


Use caution when adding electri-
cal accessories. If electrical acces-
sories exceed the capacity of the
motorcycle’s electrical system an
electric failure could result, which
could cause a dangerous loss of
lights or engine power.
U1B3E0E0.book Page 3 Monday, February 9, 2004 2:27 PM

INSTRUMENT AND CONTROL FUNCTIONS
3-1
3
EAU10972
Immobilizer system This vehicle is equipped with an immo-
bilizer system to help prevent theft by
re-registering codes in the standard
keys. This system consists of the fol-
lowing.

a code re-registering key (with a
red bow)


two standard keys (with a black
bow) that can be re-registered with
new codes


a transponder (which is installed in
the code re-registering key)


an immobilizer unit


an ECU


an immobilizer system indicator
light (See page 3-3.)
The key with the red bow is used to reg-
ister codes in each standard key. Since
re-registering is a difficult process, take
the vehicle along with all three keys to
a Yamaha dealer to have them re-reg-
istered. Do not use the key with the red
bow for driving. It should only be used
for re-registering the standard keys. Al-
ways use a standard key for driving.
CAUTION:
ECA11820


DO NOT LOSE THE CODE RE-
REGISTERING KEY! CONTACT
YOUR DEALER IMMEDIATELY
IF IT IS LOST! If the code re-reg-
istering key is lost, registering
new codes in the standard keys
is impossible. The standard
keys can still be used to start
the vehicle, however if code re-
registering is required (i.e., if a
new standard key is made or all
keys are lost) the entire immobi-
lizer system must be replaced.
Therefore, it is highly recom-mended to use either standard
key and keep the code re-regis-
tering key in a safe place.


Do not submerse any key in wa-
ter.


Do not expose any key to exces-
sively high temperatures.


Do not place any key close to
magnets (this includes, but not
limited to, products such as
speakers, etc.).


Do not place heavy items on any
key.


Do not grind any key or alter its
shape.


Do not disassemble the plastic
part of any key.


Do not put two keys of any im-
mobilizer system on the same
key ring.


Keep the standard keys as well
as keys of other immobilizer
systems away from this vehi-
cle’s code re-registering key.


Keep other immobilizer system
keys away from the main switch
as they may cause signal inter-ference.
1. Code re-registering key (red bow)
2. Standard keys (black bow)
U1B3E0E0.book Page 1 Monday, February 9, 2004 2:27 PM

INSTRUMENT AND CONTROL FUNCTIONS
3-14
3
EAU32980
Seat To remove the seat
1. Insert the key into the seat lock,
and then turn it counterclockwise.
2. While holding the key in that posi-
tion, lift the rear of the seat up, and
then pull the seat off.
To install the seat
1. Insert the projection on the front of
the seat into the seat holder as
shown.2. Push the rear of the seat down to
lock it in place.
3. Remove the key.
NOTE:Make sure that the seat is properly se-cured before riding.
EAU14421
Storage compartment This storage compartment is designed
to hold a genuine Yamaha U-LOCK.
(Other locks may not fit.) When placing
a U-LOCK in the storage compartment,
securely fasten it with the straps. When
the U-LOCK is not in the storage com-
partment, be sure to secure the straps
to prevent losing them.
WARNING
EWA10961


Do not exceed the load limit of 3
kg (7 lb) for the storage com-
partment.
1. Seat lock
2. Unlock.
1. Projection
2. Seat holder
1. U-LOCK bar (optional)
2. Yamaha U-LOCK
3. Strap
U1B3E0E0.book Page 14 Monday, February 9, 2004 2:27 PM

PERIODIC MAINTENANCE AND MINOR REPAIR
6-14
6
WARNING
EWA11020
Because loading has an enormous
impact on the handling, braking,
performance and safety characteris-
tics of your motorcycle, you should
keep the following precautions in
mind.


NEVER OVERLOAD THE
MOTORCYCLE! Operation of an
overloaded motorcycle may re-
sult in tire damage, loss of con-
trol, or severe injury. Make sure
that the total weight of rider,
passenger, cargo, and accesso-
ries does not exceed the speci-
fied maximum load for the
vehicle.


Do not carry along loosely
packed items, which can shift
during a ride.


Securely pack the heaviest
items close to the center of the
motorcycle and distribute the
weight evenly on both sides.


Adjust the suspension and tire
air pressure with regard to the
load.


Check the tire condition and airpressure before each ride.Tire inspection
The tires must be checked before each
ride. If the center tread depth reaches
the specified limit, if the tire has a nail or
glass fragments in it, or if the sidewall is
cracked, have a Yamaha dealer re-
place the tire immediately.
NOTE:The tire tread depth limits may differ
from country to country. Always complywith the local regulations.
Tire air pressure (measured on cold
tires):
0–90 kg (0–198 lb):
Front:
225 kPa (33 psi) (2.25 kgf/cm²)
Rear:
250 kPa (36 psi) (2.50 kgf/cm²)
90–196 kg (198–432 lb):
Front:
250 kPa (36 psi) (2.50 kgf/cm²)
Rear:
290 kPa (42 psi) (2.90 kgf/cm²)
High-speed riding:
Front:
225 kPa (33 psi) (2.25 kgf/cm²)
Rear:
250 kPa (36 psi) (2.50 kgf/cm²)
Maximum load*:
196 kg (432 lb)
* Total weight of rider, passenger, car-
go and accessories
1. Tire sidewall
2. Tire tread depth
Minimum tire tread depth (front and
rear):
1.6 mm (0.06 in)
U1B3E0E0.book Page 14 Monday, February 9, 2004 2:27 PM

PERIODIC MAINTENANCE AND MINOR REPAIR
6-15
6
WARNING
EWA10470


Have a Yamaha dealer replace
excessively worn tires. Besides
being illegal, operating the vehi-
cle with excessively worn tires
decreases riding stability and
can lead to loss of control.


The replacement of all wheel
and brake related parts, includ-
ing the tires, should be left to a
Yamaha dealer, who has the
necessary professional knowl-edge and experience.
Tire informationThis motorcycle is equipped with cast
wheels and tubeless tires with valves.
WARNING
EWA10480


The front and rear tires should
be of the same make and de-
sign, otherwise the handling
characteristics of the motor-
cycle cannot be guaranteed.


After extensive tests, only the
tires listed below have been ap-
proved for this model by
Yamaha Motor Co., Ltd.


Always make sure that the valve
caps are securely installed to
prevent air pressure leakage.


Use only the tire valves and
valve cores listed below to
avoid tire deflation during ahigh-speed ride.
WARNING
EWA10600
This motorcycle is fitted with super-
high-speed tires. Note the following
points in order to make the most ef-
ficient use of these tires.

Use only the specified replace-
ment tires. Other tires may run
the danger of bursting at super
high speeds.


Brand-new tires can have a rela-
tively poor grip on certain road
surfaces until they have been
1. Tire air valve
2. Tire air valve core
3. Tire air valve cap with seal
Front tire:
Size:
120/70 ZR17M/C (58W)
Manufacturer/model:
BRIDGESTONE/BT020F GG
DUNLOP/D252F
Rear tire:
Size:
180/55 ZR17M/C (73W)
Manufacturer/model:
BRIDGESTONE/BT020R GG
DUNLOP/D252
FRONT and REAR:
Tire air valve:
TR412
Va l ve c o r e :
#9000A (original)
U1B3E0E0.book Page 15 Monday, February 9, 2004 2:27 PM

PERIODIC MAINTENANCE AND MINOR REPAIR
6-24
6
EAU23271
Checking the front fork The condition and operation of the front
fork must be checked as follows at the
intervals specified in the periodic main-
tenance and lubrication chart.
To check the condition
WARNING
EWA10750
Securely support the vehicle so thatthere is no danger of it falling over.
Check the inner tubes for scratches,
damage and excessive oil leakage.
To check the operation
1. Place the vehicle on a level sur-
face and hold it in an upright posi-
tion.
2. While applying the front brake,
push down hard on the handlebars
several times to check if the front
fork compresses and rebounds
smoothly.
CAUTION:
ECA10590
If any damage is found or the front
fork does not operate smoothly,
have a Yamaha dealer check or re-pair it.
EAU23280
Checking the steering Worn or loose steering bearings may
cause danger. Therefore, the operation
of the steering must be checked as fol-
lows at the intervals specified in the pe-
riodic maintenance and lubrication
chart.
1. Place a stand under the engine to
raise the front wheel off the
ground.
WARNING
EWA10750
Securely support the vehicle so thatthere is no danger of it falling over.
2. Hold the lower ends of the front
fork legs and try to move them for-
ward and backward. If any free
play can be felt, have a Yamaha
dealer check or repair the steering.
U1B3E0E0.book Page 24 Monday, February 9, 2004 2:27 PM

PERIODIC MAINTENANCE AND MINOR REPAIR
6-28
6
EAU34380
Replacing the headlight bulb This model is equipped with a quartz
bulb headlight. If the headlight bulb
burns out, replace it as follows.
1. Remove the headlight unit by re-
moving the bolts on each side.
2. Disconnect the headlight coupler,
and then remove the bulb cover.3. Unhook the headlight bulb holder,
and then remove the defective
bulb.
WARNING
EWA10790
Headlight bulbs get very hot. There-
fore, keep flammable products away
from a lit headlight bulb, and do not
touch the bulb until it has cooleddown.
4. Place a new headlight bulb into po-
sition, and then secure it with the
bulb holder.CAUTION:
ECA10660
Do not touch the glass part of the
headlight bulb to keep it free from
oil, otherwise the transparency of
the glass, the luminosity of the bulb,
and the bulb life will be adversely af-
fected. Thoroughly clean off any dirt
and fingerprints on the headlight
bulb using a cloth moistened with al-cohol or thinner.
1. Bolt
1. Headlight bulb cover
2. Headlight coupler
1. Headlight bulb holder
2. Headlight bulb
U1B3E0E0.book Page 28 Monday, February 9, 2004 2:27 PM

PERIODIC MAINTENANCE AND MINOR REPAIR
6-32
6
EAU24360
Front wheel
EAU34390
To remove the front wheel
WARNING
EWA10820


It is advisable to have a Yamaha
dealer service the wheel.


Securely support the motor-
cycle so that there is no dangerof it falling over.
1. Lift the front wheel off the ground
according to the procedure on
page 6-31.
2. Loosen the front wheel axle pinch
bolt, then the wheel axle and the
brake caliper bolts.3. Remove the brake hose holder on
each side by removing the bolts.
4. Remove the brake caliper on each
side by removing the bolts.
CAUTION:
ECA11050
Do not apply the brake after the
brake calipers have been removed,
otherwise the brake pads will beforced shut.
5. Pull the wheel axle out, and then
remove the wheel.
EAU24860
To install the front wheel
1. Lift the wheel up between the fork
legs.
2. Insert the wheel axle.
3. Lower the front wheel so that it is
on the ground.
4. Install the brake calipers by install-
ing the bolts.NOTE:Make sure that there is enough space
between the brake pads before install-
ing the brake calipers onto the brakediscs.
5. Install the brake hose holders by
installing the bolts.
6. Tighten the wheel axle, the front
wheel axle pinch bolt and the
brake caliper bolts to the specified
torques.
1. Wheel axle
2. Front wheel axle pinch bolt
1. Brake hose holder
2. Brake caliper
3. Bolt
Tightening torques:
Wheel axle:
72 Nm (7.2 m·kgf, 52 ft·lbf)
Front wheel axle pinch bolt:
19 Nm (1.9 m·kgf, 14 ft·lbf)
Brake caliper bolt:
40 Nm (4.0 m·kgf, 29 ft·lbf)
U1B3E0E0.book Page 32 Monday, February 9, 2004 2:27 PM