Yamaha XT660R S Service Manual

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ENG
TRANSMISSION
2. Measure:
• drive axle runout
(with a centering device and dial gauge 1)
Out of specification → Replace the drive
axle.
Drive axle runout limit
0.08 mm (0.0031 in)
3. Check:
• transmission gears
Blue discoloration/pitting/wear → Replace
the defective gear(s).
• transmission gear dogs
Cracks/damage/rounded edges → Replace
the defective gear(s).
4. Check:
• transmission gear engagement
(each pinion gear to its respective wheel
gear)
Incorrect → Reassemble the transmission
axle assemblies.
5. Check:
• transmission gear movement
Rough movement → Replace the defective
part(s).
6. Check:
• circlips
Bends/damage/looseness → Replace.
ASSEMBLING THE MAIN AXLE AND DRIVE
AXLE
1. Install:
• toothed washer 1
• circlip 2
NOTE:
_
• Be sure the circlip shape-edged corner a is
positioned opposite side to the toothed
washer and gear.
• Install the circlip so that both ends b are
positioned in the center of each axle spline
c.
New

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