Yamaha XT660X 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 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