Yamaha XT660X Service Manual

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CHAS
REAR WHEEL, BRAKE DISC, AND REAR WHEEL
SPROCKET
3. Measure:
• brake disc thickness
Measure the brake disc thickness at a few
different locations.
Out of specification → Replace.
Brake disc thickness limit (mini-
mum)
4.5 mm (0.18 in)
4. Adjust:
• brake disc deflection
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a. Remove the brake disc.
b. Rotate the brake disc by one bolt hole.
c. Install the brake disc.
NOTE:
_
Tighten the brake disc bolts in stages and in a
crisscross pattern.
d. Measure the brake disc deflection.
e. If out of specification, repeat the adjustment
steps until the brake disc deflection is within
specification.
f. If the brake disc deflection cannot be
brought within specification, replace the
brake disc.
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T
R
.
.
Brake disc bolt
13 Nm (1.3 m · kg, 9.4 ft · lb)
LOCTITE
®
EAS00567
CHECKING THE REAR WHEEL DRIVE HUB
1. Check:
• rear wheel drive hub 1
Cracks/damage → Replace.
• rear wheel drive hub dampers 2
Damage/wear → Replace.
1
2

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