Yamaha YZ450FA 2011 Owner's Service Manual page 150

2. Install:
• Conical washer "1"
• Nut (clutch boss) "2"
Nut (clutch boss):
75 Nm (7.5 m•kg, 54 ft•lb)
Make sure to tighten to specification; other-
wise, it may damage the other part that is
fastened together.
• Apply engine oil to the threads and contact
surface of the clutch boss nut.
• Apply engine oil to the contact surfaces of the
conical washer.
• Install the conical washer with its convex sur-
face "b" outward.
• Use the clutch holding tool "3" to hold the
clutch boss.
Clutch holding tool:
YM-91042/90890-04086
A. For USA and CDN
B. Except for USA and CDN
3. Install:
• Friction plate "1"
• Clutch plate "2"
• Install the clutch plates and friction plates al-
ternately on the clutch boss, starting with a
friction plate and ending with a friction plate.
• Apply the engine oil on the friction plates and
clutch plates.
4. Install:
• Bearing "1"
• Washer "2"
• Circlip "3"
To push rod 1 "4".
Apply the engine oil on the bearing and washer.
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CLUTCH