Yamaha XT660X Service Manual

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CHAS
SWINGARM AND DRIVE CHAIN
2. Check:
• pivot shaft
Roll the pivot shaft on a flat surface.
Bends → Replace.
WARNING
_
Do not attempt to straighten a bent pivot
shaft.
3. Wash:
• pivot shaft
• dust covers
• spacer
• bushing
• bearings
4. Check:
• dust covers
• spacers
• oil seals
Damage/wear → Replace.
• bearings
• bushings
Damage/pitting → Replace.
Recommended cleaning solvent
Kerosene
EAS00709
CHECKING THE DRIVE CHAIN
1. Measure:
• a 15-link section a of the drive chain
Out of specification → Replace the drive
chain.
NOTE:
_
• While measuring the 15-link section, push
down on the drive chain to increase its ten-
sion.
• Measure the length between drive chain
roller 1 and F as shown.
• Perform this measurement at two or three
different places.
15-link drive chain section limit
(maximum)
240.5 mm (9.47 in)

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