Yamaha XT660R S Service Manual

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CHAS
FRONT FORK
• Avoid bottoming the inner tube into the
outer tube during the above procedure,
as the oil flow stopper will be damaged.
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EAS00657
CHECKING THE FRONT FORK LEGS
The following procedure applies to both of the
front fork legs.
1. Check:
• inner tube
1
• outer tube
2
Bends/damage/scratches
→
Replace.
WARNING
_
Do not attempt to straighten a bent inner
tube as this may dangerously weaken it.
È
XT660R
É
XT660X
2
1
È
2
1
É
2. Measure:
• spring free length
a
Out of specification → Replace.
Spring free length
XT660R
633.0 mm (24.92 in)
<Limit>: 620 mm (24.41 in)
XT660X
593.0 mm (23.35 in)
<Limit>: 581 mm (22.87 in)

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