Yamaha XT660R S Service Manual

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ENG
CLUTCH
2. Measure:
• friction plate 1 thickness
• friction plate 2 thickness
• friction plate 3 thickness
Out of specification → Replace the friction
plates as a set.
NOTE:
_
Measure the friction plate at four places.
Friction plate 1 thickness
2.90 ~ 3.10 mm (0.114 ~ 0.122 in)
<Limit>: 2.80 mm (0.110 in)
Friction plate 2 thickness
2.92 ~ 3.08 mm
(0.115 ~ 0.121 in)
<Limit>: 2.80 mm (0.110 in)
Friction plate 3 thickness
2.90 ~ 3.10 mm (0.114 ~ 0.122 in)
<Limit>: 2.80 mm (0.110 in)
EAS00281
CHECKING THE CLUTCH PLATES
The following procedure applies to all of the
clutch plates.
1. Check:
• clutch plate
Damage → Replace the clutch plates as a
set.
2. Measure:
• clutch plate warpage
(with a surface plate and thickness gauge
1)
Out of specification → Replace the clutch
plates as a set.
Clutch plate warpage limit
0.20 mm (0.0079 in)
EAS00282
CHECKING THE CLUTCH SPRINGS
The following procedure applies to all of the
clutch springs.
1. Check:
• clutch spring
Damage → Replace the clutch springs as a
set.

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