2008 YAMAHA YZF-R1 ECU

SAFETY INFORMATION
1-3
1Loading
The total weight of the operator, pas-
senger, accessories and cargo must
not exceed the maximum load limit.
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 sleepingbags, 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 accessories
are 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-
Maximum load:
195 kg (430 lb)
U4C8E1E0.book Page 3 Wednesday, June 13, 2007 9:24 AM

INSTRUMENT AND CONTROL FUNCTIONS
3-1
3
EAU10974
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 (Electronic Control Unit)


an immobilizer system indicator
light (See page 3-4.)
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:
ECA11821


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 items that transmit
electrical signals close to any
key.


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.
1. Code re-registering key (red bow)
2. Standard keys (black bow)
U4C8E1E0.book Page 1 Wednesday, June 13, 2007 9:24 AM

INSTRUMENT AND CONTROL FUNCTIONS
3-20
32. Lift the front of the passenger seat
and pull it forward.
To install the passenger seat
1. Insert the projection on the rear of
the passenger seat into the seat
holder as shown, and then push
the front of the seat down to lock it
in place.
2. Remove the key.NOTE:Make sure that the seats are properlysecured before riding.
EAU33870
Helmet holders The helmet holders are located on the
bottom of the passenger seat.
To secure a helmet to a helmet hold-
er
1. Remove the passenger seat. (See
page 3-19.)
2. Attach the helmet to a helmet hold-
er, and then securely install the
passenger seat.
WARNING
EWA11040
Never ride with a helmet attached to
a helmet holder, since the helmet
may hit objects, causing loss of con-trol and possibly an accident.To release a helmet from a helmet
holder
Remove the passenger seat, remove
the helmet from the helmet holder, and
then install the seat.
1. Projection
2. Seat holder
1. Helmet holder
U4C8E1E0.book Page 20 Wednesday, June 13, 2007 9:24 AM

PERIODIC MAINTENANCE AND MINOR REPAIR
6-19
6
EAU21771
Tires To maximize the performance, durabil-
ity, and safe operation of your motor-
cycle, note the following points
regarding the specified tires.
Tire air pressure
The tire air pressure should be checked
and, if necessary, adjusted before each
ride.
WARNING
EWA10500


The tire air pressure must be
checked and adjusted on cold
tires (i.e., when the temperature
of the tires equals the ambient
temperature).


The tire air pressure must be ad-
justed in accordance with the
riding speed and with the total
weight of rider, passenger, car-
go, and accessories approvedfor this model.
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 air pressure (measured on cold
tires):
0–90 kg (0–198 lb):
Fr o nt :
250 kPa (36 psi) (2.50 kgf/cm²)
Rear:
290 kPa (42 psi) (2.90 kgf/cm²)
90–195 kg (198–430 lb):
Fr o nt :
250 kPa (36 psi) (2.50 kgf/cm²)
Rear:
290 kPa (42 psi) (2.90 kgf/cm²)
High-speed riding:
Fr o nt :
250 kPa (36 psi) (2.50 kgf/cm²)
Rear:
290 kPa (42 psi) (2.90 kgf/cm²)
Maximum load*:
195 kg (430 lb)
* Total weight of rider, passenger, car-
go and accessories
U4C8E1E0.book Page 19 Wednesday, June 13, 2007 9:24 AM

PERIODIC MAINTENANCE AND MINOR REPAIR
6-20
6Tire 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.
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.
1. Tire sidewall
2. Tire tread depthMinimum tire tread depth (front and
rear):
1.6 mm (0.06 in)
1. Tire air valve
2. Tire air valve core
3. Tire air valve cap with seal
U4C8E1E0.book Page 20 Wednesday, June 13, 2007 9:24 AM

PERIODIC MAINTENANCE AND MINOR REPAIR
6-29
6
EAUM1650
Lubricating the swingarm piv-
ots The swingarm pivots must be lubricat-
ed at the intervals specified in the peri-
odic maintenance and lubrication chart.
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.
Recommended lubricant:
Lithium-soap-based grease
U4C8E1E0.book Page 29 Wednesday, June 13, 2007 9:24 AM

PERIODIC MAINTENANCE AND MINOR REPAIR
6-30
6
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.
EAU23290
Checking the wheel bearings The front and rear wheel bearings must
be checked at the intervals specified in
the periodic maintenance and lubrica-
tion chart. If there is play in the wheel
hub or if the wheel does not turn
smoothly, have a Yamaha dealer check
the wheel bearings.
U4C8E1E0.book Page 30 Wednesday, June 13, 2007 9:24 AM

PERIODIC MAINTENANCE AND MINOR REPAIR
6-32
6charger will damage the battery.
If you do not have access to a
sealed-type (MF) battery charg-
er, have a Yamaha dealer
charge your battery.
EAU42921
Replacing the fuses To access the main fuse
The main fuse is located under the rider
seat and can be accessed as follows:
1. Remove the rider seat. (See page
3-19.)
2. Move the ECU (Electronic Control
Unit) away from the fuse.
To access the fuel injection system
fuse
The fuel injection system fuse is locat-
ed under the fuel tank and can be ac-
cessed as follows:
1. Lift the fuel tank. (See page 6-16.)
2. Pull up the rubber damper as
shown.1. ECU (Electronic Control Unit)
1. Main fuse
U4C8E1E0.book Page 32 Wednesday, June 13, 2007 9:24 AM