Yamaha XT660R S Service Manual

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CHAS
REAR WHEEL, BRAKE DISC, AND REAR WHEEL
SPROCKET
EAS00568
CHECKING AND REPLACING THE REAR
WHEEL SPROCKET
1. Check:
• rear wheel sprocket
More than 1/4 tooth
a
wear
→
Replace the
rear wheel sprocket.
Bent teeth
→
Replace the rear wheel
sprocket.
b
Correct
1
Drive chain roller
2
Rear wheel sprocket
2. Replace:
• rear wheel sprocket
▼▼▼▼ ▼ ▼▼▼▼ ▼ ▼▼▼▼ ▼ ▼▼▼▼ ▼ ▼▼▼▼ ▼ ▼▼▼▼ ▼▼▼
a. Remove the self-locking nuts and the rear
wheel sprocket.
b. Clean the rear wheel drive hub with a clean
cloth, especially the surfaces that contact
the sprocket.
c. Install the new rear wheel sprocket.
NOTE:
_
Tighten the self-locking nuts in stages and in a
crisscross pattern.
▲▲▲▲ ▲ ▲▲▲▲ ▲ ▲▲▲▲ ▲ ▲▲▲▲ ▲ ▲▲▲▲ ▲ ▲▲▲▲ ▲▲▲
T
R
.
.
Rear wheel sprocket self-locking
nut
69 Nm (6.9 m · kg, 50 ft · lb)
EAS00571
INSTALLING THE REAR WHEEL
1. Lubricate:
• wheel axle
• oil seal lips
Recommended lubricant
Lithium-soap-based grease

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