Yamaha XT660X 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 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