2004 YAMAHA YZF-R1SC high beam

2-16
ELECTRICAL SPECIFICATIONSSPEC
ItemStandardLimit
Indicator light
(voltage / wattage
quantity)
Neutral indicator light
High beam indicator light
Oil level warning light
Turn signal indicator light
Fuel level warning light
Coolant temparture indicator light
Engine trouble warning light
Shift timing indicator light
LED
1
LED
1
LED
1
LED
2
LED
1
LED
1
LED
1
LED
1































Electric starting system
System type
Starter motor
Model (manufacturer)
Power output
Brushes
Overall length
Spring force
Armature coil resistance
Commutator diameter
Mica undercut
Constant mesh
5VY (YAMAHA)
0.9 kW
10.8 mm (0.43 in)
5.28  7.92 N (538  808 g,
18.99  28.48 oz)
0.0090  0.0110 Ω at 20C (68F)
24.5 mm (0.96 in)
1.5 mm (0.06 in)











3.6 mm
(0.14 in)








23.5 mm
(0.93 in)




Starter relay
Model (manufacturer)
Amperage
Coil resistance
2768079-A (JIDECO)
180 A
4.18  4.62 Ω at 20C (68F)











Horn
Horn type
Model (manufacturer)
quantity
Max. amperage
Performance
Coil resistance
Plane
YF-12 (NIKKO)
1
3 A
105  113 db / 2 m
1.15  1.25 Ω at 20C (68F)



















Turn signal relay
Relay type
Model (manufacturer)
Self-cancelling device built-in
Turn signal blinking frequency
Wattage
Full transistor
FE218BH (DENSO)
No
75  95 cycles / min.
21 W
2 + 3.4 W



















Oil level switch
Model (manufacturer)
5VY (SOMIC ISHIKAWA)



EXUP servo motor
Model (manufacturer)
5VY (YAMAHA)



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3-69
A
A
B
B
B
REPLACING THE HEADLIGHT BULBS
CHK
ADJ
WARNING
EAS00183
REPLACING THE HEADLIGHT BULBS
The following procedure applies to both of the
headlight bulbs.
1. Disconnect:

headlight bulb cover
1

headlight coupler 2
Ahigh beam
Blow beam
2. Remove:

headlight bulb holder
1
Ahigh beam
Blow beam
3. Remove:

headlight bulb
Since the headlight bulb gets extremely hot,
keep flammable products and your hands
away from the bulb until it has cooled down.
4. Install:

headlight bulb
New
Secure the new headlight bulb with the head-
light bulb holder.
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3-70
REPLACING THE HEADLIGHT BULBS /
ADJUSTING THE HEADLIGHT BEAMSCHK
ADJ
CAUTION:
a
b
a
b
Avoid touching the glass part of the head-
light bulb to keep it free from oil, otherwise
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 clean it with a cloth moistened
with alcohol or lacquer thinner.
5. Install:

headlight bulb holder
6. Install:

headlight bulb cover (high beam)

headlight bulb coupler (low beam)
7. Connect:

headlight coupler (high beam)

headlight cover (low beam)
EAS00185
ADJUSTING THE HEADLIGHT BEAMS
The following procedure applies to both of the
headlights.
1. Remove:

front cowling inner panels
Refer to “COWLINGS”.
2. Adjust:

headlight beam (vertically)
a. Turn the adjusting screw
1 in direction a or
b.
Direction
Headlight beam is raised.
DirectionHeadlight beam is
lowered.
3. Adjust:

headlight beam (horizontally)
a. Turn the adjusting screw
2 in direction a or
b.
Direction
Headlight beam moves to
the left.
DirectionHeadlight beam moves to
the right.
4. Install:

front cowling inner panels
Refer to “COWLINGS”.
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8-29
YESNO

Clean the battery
terminals.

Recharge or re-
place the battery.
EAS00749
3. Main switch

Check the main switch for continuity.
Refer to “CHECKING THE SWITCHES”.

Is the main switch OK?
YESNO
Replace the main
switch.
EAS00784
YESNO 4. Dimmer switch

Check the dimmer switch for continuity.
Refer to “CHECKING THE SWITCHES”.

Is the dimmer switch OK?
The dimmer switch is
faulty. Replace the
left handlebar switch.
Minimum open-circuit voltage
12.8 V or more at 20C (68F)

Is the battery OK?
LIGHTING SYSTEMELEC
NOTE:
YESNO
1. Main, turn and headlight fuses

Check the main, turn and headlight fuses for
continuity.
Refer to “CHECKING THE FUSES” in chap-
ter 3.

Are the main, turn and headlight fuses OK?
Replace the fuse(s).
2. Battery

Check the condition of the battery.
Refer to “CHECKING AND CHARGING
THE BATTERY” in chapter 3.
EAS00739EAS00781
TROUBLESHOOTING
Any of the following fail to light: headlight,
high beam indicator light, taillight, licence
light or meter light.
Check:
1. main, turn and headlight fuses
2. battery
3. main switch
4. dimmer switch
5. pass switch
6. headlight relay (on / off)
7. headlight relay (dimmer)
8. wiring connections
(of the entire lighting system)

Before troubleshooting, remove the following
part(s):
1. seat
2. fuel tank
3. side cowlings

Troubleshoot with the following special tool(s).
Pocket tester
90890-03112, YU-3112
EAS00738
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8-31
High beam indicator light (LEDs)
Positive tester probe
black / yellow
Negative tester probe

black / white
YESNO 1. Headlight bulb and socket

Check the headlight bulb and socket for con-
tinuity.
Refer to “CHECKING THE BULBS AND
BULB SOCKETS”.

Are the headlight bulb and socket OK?
Replace the head-
light bulb, socket or
both.
YESNO 2. Voltage

Connect the pocket tester (DC 20 V) to the
headlight and meter assembly couplers as
shown.
The wiring circuit
from the main switch
to the headlight cou-
pler is faulty and
must be repaired.
When the dimmer switch is set to “ ”
When the dimmer switch is set to “ ”
Headlight coupler (wire harness side)
Low beam
Headlight
Positive tester probe
black
Negative tester probe
black / green
1
2
Meter assembly coupler (wire harness side)

Turn the main switch to “ON”.

Start the engine.

Set the dimmer switch to “ ” or “ ”.

Measure the voltage (DC 12 V) of
black / green or black / yellow on the
headlight coupler (wire harness side).

Is the voltage within specification?
2
This circuit is OK.
A
B
Headlight
Positive tester probe
black
Negative tester probe
black / yellow
A
Headlight coupler (wire harness side)
High beam
B
6
5
3
4
4
LIGHTING SYSTEMELEC
EAS00788
CHECKING THE LIGHTING SYSTEM
1. The headlight and the high beam indicator
light fail to come on.
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