Yamaha XT660X Service Manual

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ELEC
LIGHTING SYSTEM
EAS00781
TROUBLESHOOTING
Check:
1. main, headlight, and parking lighting fuses
2. battery
3. main switch
4. dimmer switch
5. pass switch
6. headlight relay
7. wiring connections
(of the entire lighting system)
NOTE:
_
• Before troubleshooting, remove the following
part(s):
1. seat
2. battery cover
3. side panels (left and right)
4. fuel tank side covers (left and right)
5. fuel tank
6. headlight assembly
• Troubleshoot with the following special
tool(s).
EAS00738
YES
NO
EAS00739
YES
NO
EAS00749
YES
NO
Any of the following fail to come on:
headlight, high beam indicator light, tail/
brake light, on auxiliary light.
Pocket tester
90890-03112
1. Main, headlight, and parking lighting fuses
• Check the main, headlight, and parking
lighting fuses for continuity.
Refer to “CHECKING THE FUSES” in
chapter 3.
• Are the main, headlight, and parking light-
ing fuses OK?
Replace the fuse(s).
2. Battery
• Check the condition of the battery.
Refer to “CHECKING AND CHARGING
THE BATTERY” in chapter 3.
Minimum open-circuit voltage
12.8 V or more at 20 °C (68 °F)
• Is the battery OK?
• Clean the battery
terminals.
• Recharge or
replace the battery.
3. Main switch
• Check the main switch for continuity.
Refer to “CHECKING THE SWITCHES”.
• Is the main switch OK?
Replace the main
switch/immobilizer
unit.

Yamaha XT660X Specifications

General

Displacement	660cc
Bore x Stroke	100.0 mm x 84.0 mm
Compression Ratio	10.0:1
Fuel System	Fuel Injection
Ignition System	TCI
Transmission	5-speed
Final Drive	Chain
Rear Brake	Single disc, Ø 245 mm
Front Tyre	120/70 R17
Rear Tyre	160/60 R17
Maximum Power	48 HP (35.3 kW) @ 6, 000 rpm
Maximum Torque	58.4Nm (43.1lb-ft) @ 5, 250rpm
Front Suspension	Telescopic fork
Rear Suspension	Swingarm, (link suspension)
Fuel Tank Capacity	15 litres
Engine Type	Liquid-cooled, 4-stroke, single cylinder, SOHC, 4-valves