Yamaha XT660R S Service Manual

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ENG
ROCKER ARMS AND CAMSHAFT
5. Calculate:
• rocker-arm-to-rocker-arm-shaft clearance
NOTE:
_
Calculate the clearance by subtracting the
rocker arm shaft outside diameter from the
rocker arm inside diameter.
Above 0.081 mm (0.0032 in) → Replace the
defective part(s).
Rocker-arm-to-rocker-arm-shaft
clearance
0.009 ~ 0.037 mm
(0.0004 ~ 0.0015 in)
<Limit>: 0.081 mm (0.0032 in)
EAS00220
INSTALLING THE CAMSHAFT AND
ROCKER ARMS
1. Install:
• bearing 1
(onto the camshaft)
NOTE:
• Apply engine oil to the bearing.
• Install the bearing so that the seal is facing
a the camshaft.
2. Lubricate:
• camshaft
• decompressor lever pin
• decompressor lever
Installed depth b
0 mm (0 in)
Recommended lubricant
Camshaft
Molybdenum disulfide oil
Camshaft bearing
Engine oil
1
a
b

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