Yamaha XT660R S Service Manual

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ENG
VALVES AND VALVE SPRINGS
EAS00236
VALVES AND VALVE SPRINGS
New
M
M
New
New
M
M
M
7
6
5
5
4
4
3
2
1
6
7
7
6
3
2
3
2
1
2
3
6
7
Order Job/Part Q’ty Remarks
Removing the valves and valve
springs
Remove the parts in the order listed.
Cylinder head Refer to “CYLINDER HEAD”.
Rocker arms/rocker arm shafts/cam-
shaft
Refer to “ROCKER ARMS AND CAM-
SHAFT”.
1 Valve cotter 8
Refer to “REMOVING THE VALVES”
and “INSTALLING THE VALVES”.
2 Valve spring retainer 4
3 Valve spring 4
4 Exhaust valve 2
5 Intake valve 2
6 Valve stem seal 4
7 Valve spring seat 4
For installation, reverse the removal pro-
cedure.

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