Yamaha XT660R S Service Manual

4 - 72
CHAS
STEERING HEAD
3. Replace:
• bearings
• bearing races
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a. Remove the bearing races from the steering
head pipe with a long rod 1 and hammer.
b. Remove the bearing race from the lower
bracket with a floor chisel 2 and hammer.
c. Install a new dust seal and new bearing
races.
CAUTION:
_
If the bearing race is not installed properly,
the steering head pipe could be damaged.
NOTE:
_
• Always replace the bearings and bearing
races as a set.
• Whenever the steering head is disassem-
bled, replace the dust seal.
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4. Check:
• upper bracket
• lower bracket
(along with the steering stem)
Bends/cracks/damage → Replace.
EAS00683
INSTALLING THE STEERING HEAD
1. Lubricate:
• upper bearing
• lower bearing
• bearing races
Recommended lubricant
Lithium-soap-based grease
2. Install:
• lower ring nut 1
• rubber washer 2
• upper ring nut 3
• lock washer 4
Refer to “CHECKING THE STEERING
HEAD” in chapter 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