Yamaha XT660R S Service Manual

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CHAS
FRONT AND REAR BRAKES
EAS00592
CHECKING THE FRONT AND REAR BRAKE
MASTER CYLINDERS
The following procedure applies to both of the
brake master cylinders.
1. Check:
• brake master cylinder
1
Damage/scratches/wear
→
Replace.
• brake fluid delivery passages
(brake master cylinder body)
Obstruction
→
Blow out with compressed
air.
È
Front
É
Rear
È
1
É
2. Check:
• brake master cylinder kit
Damage/scratches/wear
→
Replace as a
set.
È
Front
É
Rear
È É
3. Check:
• front brake master cylinder reservoir
1
Cracks/damage
→
Replace.
• front brake master cylinder reservoir dia-
phragm
2
Damage/wear → Replace.
• front brake master cylinder reservoir dia-
phragm holder 3
Damage/wear → Replace.
1
2
3
4. Check:
• rear brake fluid reservoir 1
Cracks/damage → Replace.
• rear brake fluid reservoir diaphragm 2
Cracks/damage → Replace.
• rear brake fluid reservoir diaphragm holder
3
Damaged/wear → Replace.
1
2
3

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