Yamaha XT660R S Service Manual

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ELEC
SIGNALING SYSTEM
EAS00796
CHECKING THE SIGNALING SYSTEM
1. The horn fails to sound.
YES
NO
YES
NO
YES
NO
1. Horn switch
• Check the horn switch for continuity.
Refer to “CHECKING THE SWITCHES”.
• Is the horn switch OK?
Replace the left han-
dlebar switch.
2. Voltage
• Connect the pocket tester (DC 20 V) to the
horn connector at the horn terminal as
shown.
Positive tester probe → pink 1
Negative tester probe → ground
• Set the main switch to “ON”.
• Push the horn switch.
• Measure the voltage (DC 12 V) of pink at
the horn terminal.
• Is the voltage within specification?
The wiring circuit
from the main switch
to the horn connector
is faulty and must be
repaired.
P B
1
3. Horn
• Disconnect the black connector at the horn
terminal.
• Connect a jumper lead
1
to the horn ter-
minal and ground the jumper lead.
• Set the main switch to “ON”.
• Push the horn switch.
• Does the horn sound?
The horn is OK. Replace the horn.
P
1

Yamaha XT660R S Specifications

General

Displacement	660 cc
Bore x Stroke	100.0 mm x 84.0 mm
Compression Ratio	10.0:1
Fuel System	Fuel Injection
Ignition System	TCI
Starter System	Electric
Transmission System	5-speed
Final Drive	Chain
Front Suspension System	Telescopic forks
Front Tyre	90/90-21 M/C 54S
Rear Tyre	130/80-17 M/C 65S
Overall Width	865 mm
Overall Height	1, 230 mm
Seat Height	865 mm
Wheelbase	1, 505 mm
Wet Weight	181 kg
Fuel Tank Capacity	15 litres
Oil Tank Capacity	2.9 litres
Engine Type	Liquid-cooled, 4-stroke, single cylinder, SOHC
Maximum Power	48hp (35kW) @ 6, 000rpm
Frame	Steel diamond
Rear Suspension System	Swingarm, (link suspension)
Front Brake	Single 298mm disc, 2-piston caliper
Rear Brake	Single Disc, 245 mm