Yamaha Yzf R1 2007 Manual

							ELECTRICAL COMPONENTS
8-82
1. Main switch
2. Horn switch
3. Dimmer switch
4. Turn signal switch
5. Clutch switch
6. Sidestand switch
7. Engine stop switch
8. Front brake light switch
9. Start switch
10.Oil level switch
11.Neutral switch
12.Rear brake light switch 
						

							ELECTRICAL COMPONENTS
8-83
Check each switch for continuity with the pocket tester. If the continuity reading is incorrect, check 
the wiring connections and if necessary, replace the switch.
CAUTION:
ECA14370
Never insert the tester probes into the coupler terminal slots “a”. Always insert the probes 
from the opposite end of the coupler, taking care not to loosen or damage the leads.
NOTE:
 Before checking for continuity, set the pocket tester to “0” and to the “Ω × 1” range.
 When checking for continuity, switch back and forth between the switch positions a few times.
The switches and their terminal connections are illustrated as in the following example of the main 
switch.
The switch positions “a” are shown in the far left column and the switch lead colors “b” are shown in 
the top row.
The continuity (i. e., a closed circuit) between switch terminals at a given switch position is indication 
by “ ” There is continuity between red, brown/blue, and brown/red when the switch is set to 
“ON” and between red and brown/red when the switch is set to “ ”.
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C 
						

							ELECTRICAL COMPONENTS
8-84
EAS27990
CHECKING THE BULBS AND BULB SOCK-
ETS
Check each bulb and bulb socket for damage 
or wear, proper connections, and also for conti-
nuity between the terminals.
Damage/wear → Repair or replace the bulb, 
bulb socket or both.
Improperly connected → Properly connect.
No continuity → Repair or replace the bulb, 
bulb socket or both.
Types of bulbs
The bulbs used on this vehicle are shown in 
the illustration.
 Bulbs “a” are used for the headlights and 
usually use a bulb holder that must be 
detached before removing the bulb.
 Bulbs “b” is used for turn signal and can be 
removed from the socket by pushing and 
turning the bulb counterclockwise.
 Bulbs “c” are used for auxiliary lights and can 
be removed from their respective socket by 
carefully pulling them out.
Checking the condition of the bulbs
The following procedure applies to all of the 
bulbs.
1. Remove:
Bulb
WARNING
EWA13320
Since the headlight bulb gets extremely 
hot, keep flammable products and your 
hands away from the bulb until it has 
cooled down.
CAUTION:
ECA14380
 Be sure to hold the socket firmly when 
removing the bulb. Never pull the lead, 
otherwise it may be pulled out of the ter-
minal in the coupler.
 Avoid touching the glass part of the head-
light bulb to keep it free from oil, other-wise the transparency of the glass, the 
life of the bulb, and the luminous flux will 
be adversely affected. If the headlight 
bulb gets soiled, thoroughly it with a cloth 
moistened with alcohol or lacquer thin-
ner.
2. Check:
 Bulb (for continuity)
(with the pocket tester)
No continuity → Replace.
NOTE:
Before checking for continuity, set the pocket 
tester to “0” and to the “Ω × 1” range.
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a. Connect the positive tester probe to termi-
nal “1” and the negative tester probe to ter-
minal “2”, and check the continuity.
b. Connect the positive tester probe to termi-
nal “1” and the negative tester probe to ter-
minal “3” and check the continuity.
c. If either of the readings indicate no continu-
ity, replace the bulb.
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Checking the condition of the bulb sockets
The following procedure applies to all of the 
bulb sockets.
1. Check:
 Bulb socket (for continuity)
(with the pocket tester)
No continuity → Replace.
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C 
						

							ELECTRICAL COMPONENTS
8-85
NOTE:
Check each bulb socket for continuity in the 
same manner as described in the bulb section; 
however, note the following.
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a. Install a good bulb into the bulb socket.
b. Connect the pocket tester probes to the 
respective leads of the bulb socket.
c. Check the bulb socket for continuity. If any 
of the readings indicate no continuity, 
replace the bulb socket.
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EAS28000
CHECKING THE FUSES
The following procedure applies to all of the 
fuses.
CAUTION:
ECA13680
To avoid a short circuit, always set the main 
switch to “OFF” when checking or replac-
ing a fuse.
1. Remove:
 Rider seat
 Passenger seat
 Side cowlings
2. Check:
Fuse
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a. Connect the pocket tester to the fuse and 
check the continuity.
NOTE:
Set the pocket tester selector to “Ω × 1”.
b. If the pocket tester indicates “∞”, replace 
the fuse.
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3. Replace:
 Blown fuse
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a. Set the main switch to “OFF”.
b. Install a new fuse of the correct amperage 
rating.
c. Set on the switches to verify if the electrical 
circuit is operational.d. If the fuse immediately blows again, check 
the electrical circuit.
WARNING
EWA13310
Never use a fuse with an amperage rating 
other than that specified. Improvising or 
using a fuse with the wrong amperage rat-
ing may cause extensive damage to the 
electrical system, cause the lighting and 
ignition systems to malfunction and could 
possibly cause a fire.
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4. Install:
 Side cowlings
 Passenger seat
 Rider seat
EAS28030
CHECKING AND CHARGING THE BATTERY
WARNING
EWA13290
Batteries generate explosive hydrogen gas 
and contain electrolyte which is made of 
poisonous and highly caustic sulfuric acid. 
Therefore, always follow these preventive 
measures:
 Wear protective eye gear when handling 
or working near batteries.
 Charge batteries in a well-ventilated area.
 Keep batteries away from fire, sparks or 
open flames (e.g., welding equipment, 
lighted cigarettes).
 DO NOT SMOKE when charging or han-
dling batteries.
 KEEP BATTERIES AND ELECTROLYTE 
OUT OF REACH OF CHILDREN.Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
FusesAmperage 
ratingQ’ty
Main 50 A 1
Headlight 25 A 1
Signaling system 7.5 A 1
Buckup 7.5 A 1
ETV 7.5 A 1
Ignition 15 A 1
Radiator fan motor 15 A 2
Reserve 7.5 A 1
Reserve 1.5 A 1
Reserve 25 A 1 
						

							ELECTRICAL COMPONENTS
8-86
 Avoid bodily contact with electrolyte as it 
can cause severe burns or permanent eye 
injury.
FIRST AID IN CASE OF BODILY CONTACT:
EXTERNAL
 Skin — Wash with water.
 Eyes — Flush with water for 15 minutes 
and get immediate medical attention.
INTERNAL
 Drink large quantities of water or milk fol-
lowed with milk of magnesia, beaten egg 
or vegetable oil. Get immediate medical 
attention.
CAUTION:
ECA13660
 This is a sealed battery. Never remove the 
sealing caps because the balance 
between cells will not be maintained and 
battery performance will deteriorate.
 Charging time, charging amperage and 
charging voltage for an MF battery are dif-
ferent from those of conventional batter-
ies. The MF battery should be charged as 
explained in the charging method illustra-
tions. If the battery is overcharged, the 
electrolyte level will drop considerably. 
Therefore, take special care when charg-
ing the battery.
NOTE:
Since MF batteries are sealed, it is not possi-
ble to check the charge state of the battery by 
measuring the specific gravity of the electro-
lyte. Therefore, the charge of the battery has to 
be checked by measuring the voltage at the 
battery terminals.
1. Remove:
 Rider seat
Refer to GENERAL CHASSIS on page 4-
1.
2. Disconnect:
 Battery leads
(from the battery terminals)
CAUTION:
ECA13640
First, disconnect the negative battery lead 
“1”, and then positive battery lead “2”.3. Remove:
Battery
4. Check:
 Battery charge
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a. Connect a pocket tester to the battery ter-
minals.
NOTE:
 The charge state of an MF battery can be 
checked by measuring its open-circuit volt-
age (i.e., the voltage when the positive bat-
tery terminal is disconnected).
 No charging is necessary when the open-cir-
cuit voltage equals or exceeds 12.8 V.
b. Check the charge of the battery, as shown 
in the charts and the following example.
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5. Charge:
Battery
(refer to the appropriate charging method 
illustration)
WARNING
EWA13300
Do not quick charge a battery.
CAUTION:
ECA13670
 Never remove the MF battery sealing 
caps.  Positive tester probe →
positive battery terminal
 Negative tester probe →
negative battery terminal
Example
Open-circuit voltage = 12.0 V
Charging time = 6.5 hours
Charge of the battery = 20–30% 
						

							ELECTRICAL COMPONENTS
8-87
 Do not use a high-rate battery charger 
since it forces a high-amperage current 
into the battery quickly and can cause 
battery overheating and battery plate 
damage.
 If it is impossible to regulate the charging 
current on the battery charger, be careful 
not to overcharge the battery.
 When charging a battery, be sure to 
remove it from the vehicle. (If charging 
has to be done with the battery mounted 
on the vehicle, disconnect the negative 
battery lead from the battery terminal.)
 To reduce the chance of sparks, do not 
plug in the battery charger until the bat-
tery charger leads are connected to the 
battery.
 Before removing the battery charger lead 
clips from the battery terminals, be sure 
to turn off the battery charger.
 Make sure the battery charger lead clips 
are in full contact with the battery termi-
nal and that they are not shorted. A cor-
roded battery charger lead clip may 
generate heat in the contact area and a 
weak clip spring may cause sparks.
 If the battery becomes hot to the touch at 
any time during the charging process, 
disconnect the battery charger and let the 
battery cool before reconnecting it. Hot 
batteries can explode!
 As shown in the following illustration, the 
open-circuit voltage of an MF battery sta-
bilizes about 30 minutes after charging 
has been completed. Therefore, wait 30 
minutes after charging is completed 
before measuring the open-circuit volt-
age.
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Charging method using a variable-current
(voltage) charger
a. Measure the open-circuit voltage prior to 
charging.
NOTE:
Voltage should be measured 30 minutes after 
the machine is stopped.
b. Connect a charged and AMP meter to the 
battery and start charging.
NOTE:
Set the charging voltage at 16–17 V.If the set-
ting is lower, charging will be insufficient. If too 
high, the battery will be over-charged.
c. Make sure that the current is higher than 
the standard charging current written on 
the battery.
NOTE:
If the current is lower than the standard charg-
ing current written on the battery, set the 
charging voltage adjust dial at 20–24 V and 
monitor the amperage for 3–5 minutes to 
check the battery.
d. Adjust the voltage so that the current is at 
the standard charging level.
e. Set the time according to the charging time 
suitable for the open-circuit voltage.
Refer to “Battery condition checking steps”.
f. If charging requires more than 5 hours, it is 
advisable to check the charging current 
after a lapse of 5 hours. If there is any 
change in the amperage, readjust the volt-
age to obtain the standard charging cur-
rent.
g. Measure the battery open-circuit voltage 
after leaving the battery unused for more 
than 30 minutes.
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Charging method using a constant voltage
charger
a. Measure the open-circuit voltage prior to 
charging.
NOTE:
Voltage should be measured 30 minutes after 
the machine is stopped.
b. Connect a charger and AMP meter to the 
battery and start charging.  Reach the standard charging current
Battery is good.
 Does not reach the standard charging cur-
rent
Replace the battery.
12.8 V or more --- Charging is complete.
12.7 V or less --- Recharging is required.
Under 12.0 V --- Replace the battery. 
						

							ELECTRICAL COMPONENTS
8-88
c. Make sure that the current is higher than 
the standard charging current written on 
the battery.
NOTE:
If the current is lower than the standard charg-
ing current written on the battery, This type of 
battery charger cannot charge the MF battery. 
A variable voltage charger is recommended.
d. Charge the battery until the battery’s charg-
ing voltage is 15 V.
NOTE:
Set the charging time at 20 hours (maximum).
e. Measure the battery open-circuit voltage 
after leaving the battery unused for more 
than 30 minutes.
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6. Install:
 Battery
7. Connect:
 Battery leads
(to the battery terminals)
CAUTION:
ECA13630
First, connect the positive battery lead “1”, 
and then the negative battery lead “2”.
8. Check:
 Battery terminals
Dirt → Clean with a wire brush.
Loose connection → Connect properly.
9. Lubricate:
 Battery terminals
10. Install:
 Rider seat
Refer to GENERAL CHASSIS on page 4-
1.
EAS28040
CHECKING THE RELAYS
Check each switch for continuity with the 
pocket tester. If the continuity reading is incor-
rect, replace the relay.1. Disconnect the relay from the wire harness.
2. Connect the pocket tester (Ω × 1) and bat-
tery (12 V) to the relay terminal as shown.
Check the relay operation.
Out of specification → Replace.
Relay unit (starting circuit cut-off relay) 12.8 V or more --- Charging is complete.
12.7 V or less --- Recharging is required.
Under 12.0 V --- Replace the battery.
Recommended lubricant
Dielectric grease
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
1. Positive battery terminal
2. Negative battery terminal
3. Positive tester probe
4. Negative tester probe
Relay operation
Continuity/No continuity
(between “3” to “4”)
1. Positive battery terminal
2. Negative battery terminal
3. Positive tester probe
4. Negative tester probe
Result
Continuity/No continuity 
						

							ELECTRICAL COMPONENTS
8-89
Relay unit (fuel pump relay)
Headlight relay (on/off)
Headlight relay (dimmer)Radiator fan motor relay
EAS4C81019
CHECKING THE TURN SIGNAL RELAY
1. Check:
 Turn signal relay input voltage
Out of specification → The wiring circuit 
from the main switch to the turn signal relay 
coupler is faulty and must be repaired.
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a. Connect the pocket tester (DC 20 V) to the 
turn signal relay terminal as shown.
1. Positive battery terminal
2. Negative battery terminal
3. Positive tester probe
4. Negative tester probe
Result
Continuity/No continuity
1. Positive battery terminal
2. Negative battery terminal
3. Positive tester probe
4. Negative tester probe
Result
Continuity/No continuity
1. Positive battery terminal
2. Negative battery terminal
3. Positive tester probe
4. Negative tester probe
Result
Continuity/No continuity
1. Positive battery terminal
2. Negative battery terminal
3. Positive tester probe
4. Negative tester probe
Result
Continuity/No continuity
Turn signal relay input voltage
DC 12 V
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
 Positive tester probe →
Blue/Red “1”
 Negative tester probe →
Ground 
						

							ELECTRICAL COMPONENTS
8-90
b. Turn the main switch to “ON”.
c. Measure the turn signal relay input voltage.
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2. Check:
 Turn signal relay output voltage
Out of specification → Replace.
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a. Connect the pocket tester (DC 20 V) to the 
turn signal relay terminal as shown.
b. Turn the main switch to “ON”.
c. Measure the turn signal relay output volt-
age.
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EAS28050
CHECKING THE RELAY UNIT (DIODE)
1. Check:
 Relay unit (diode)
Out of specification → Replace.
Turn signal relay output voltage
DC 12 V
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
 Positive tester probe →
Brown/White “1”
 Negative tester probe →
Ground
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
Continuity
Positive tester probe → Sky
blue “1” 
Negative tester probe →
Black/Yellow “2”
No continuity
Positive tester probe → Black/
Yellow “2” 
Negative tester probe → Sky
blue “1”
Continuity
Positive tester probe → Sky
blue “1”
Negative tester probe → Blue/
Yellow “3”
No continuity
Positive tester probe → Blue/
Yellow “3”
Negative tester probe → Sky
blue “1”
Continuity
Positive tester probe → Sky
blue “1”
Negative tester probe → Sky
blue/White “4”
No continuity
Positive tester probe → Sky
blue/White “4” 
Negative tester probe → Sky
blue “1”
Continuity
Positive tester probe → Blue/
Black “5”
Negative tester probe → Blue/
Yellow “3”
No continuity
Positive tester probe → Blue/
Yellow “3” 
Negative tester probe → Blue/
Black “5” 
						

							ELECTRICAL COMPONENTS
8-91
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a. Disconnect the relay unit coupler from the 
wire harness.
b. Connect the pocket tester (Ω × 1) to the 
relay unit terminal as shown.
c. Check the relay unit (diode) for continuity.
d. Check the relay unit (diode) for no continu-
ity.
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EAS28100
CHECKING THE IGNITION COILS
The following procedure applies to all of the 
ignition coils.
1. Check:
 Primary coil resistance
Out of specification → Replace.
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a. Disconnect the ignition coil connectors 
from the ignition coil terminals.
b. Connect the pocket tester (Ω × 1) to the 
ignition coil as shown.c. Measure the primary coil resistance.
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2. Check:
 Secondary coil resistance
Out of specification → Replace.
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Disconnect the ignition coil leads from the 
ignition coil.
b. Connect the pocket tester (Ω × 1k) to the 
ignition coil as shown.
c. Measure the secondary coil resistance.
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3. Check:
 Ignition spark gap
Out of specification → Replace.
Primary coil resistance
0.85–1.15 Ω at 20 °C (68°F)
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
 Positive tester probe
Ignition coil terminal
 Negative tester probe
Ignition coil terminal
Secondary coil resistance
5.02–6.79 kΩ at 20 °C (68 °F)
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
 Negative tester probe
Ignition coil terminal “1”
 Positive tester probe
Spark plug terminal “2”