Yamaha YZ450FA 2011 Owner's Service Manual page 149

CHECKING THE CLUTCH PLATES
1. Measure:
• Clutch plate warpage
Out of specification → Replace clutch plate
as a set.
Use a surface plate "1" and thickness gauge
"2".
Warp limit:
0.1 mm (0.004 in)
CHECKING THE PUSH LEVER SHAFT
1. Inspect:
• Push lever shaft "1"
Wear/damage → Replace.
CHECKING THE PUSH ROD
1. Inspect:
• Push rod 1 "1"
• Bearing "2"
• Washer "3"
• Push rod 2 "4"
• Ball "5"
Wear/damage/bend → Replace.
INSTALLING THE PUSH LEVER SHAFT
1. Install:
• Push lever shaft "1"
• Apply the lithium soap base grease on the oil
seal lip.
• Apply the engine oil on the push lever shaft.
INSTALLING THE CLUTCH
1. Install:
• Primary driven gear "1"
• Thrust washer "2"
• Clutch boss "3"
Apply the engine oil on the primary driven gear
inner circumference.
4-38
CLUTCH