Yamaha XT660X Service Manual

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CHK
ADJ
ADJUSTING THE ENGINE IDLING SPEED/
ADJUSTING THE THROTTLE CABLE FREE PLAY
EAS00054
ADJUSTING THE ENGINE IDLING SPEED
NOTE:
_
Prior to adjusting the engine idling speed, the
air filter element should be cleaned, and the
engine should have adequate compression.
1. Start the engine and let it warm up for sev-
eral minutes.
2. Check:
• engine idling speed
Out of specification
→
Adjust.
3. Adjust:
• engine idling speed
▼▼▼▼ ▼ ▼▼▼▼ ▼ ▼▼▼▼ ▼ ▼▼▼▼ ▼ ▼▼▼▼ ▼ ▼▼▼▼ ▼▼▼
a. Turn the throttle stop screw
1
in direction
a
or
b
until the specified engine idling
speed is obtained.
▲▲▲▲ ▲ ▲▲▲▲ ▲ ▲▲▲▲ ▲ ▲▲▲▲ ▲ ▲▲▲▲ ▲ ▲▲▲▲ ▲▲▲
4. Adjust:
• throttle cable free play
Refer to “ADJUSTING THE THROTTLE
CABLE FREE PLAY”.
Engine idling speed
1,300 ~ 1,500 r/min
Direction
a
Engine idling speed is
increased.
Direction
b
Engine idling speed is
decreased.
Throttle cable free play (at the
flange of the throttle grip)
3.0 ~ 5.0 mm (0.12 ~ 0.20 in)
EAS00056
ADJUSTING THE THROTTLE CABLE FREE
PLAY
NOTE:
_
Prior to adjusting the throttle cable free play,
the engine idling speed should be adjusted
properly.

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