Checking The Clutch Springs; Checking The Clutch Housing; Checking The Clutch Boss; Checking The Pressure Plate - Yamaha 2011 FZ8NA(C) Service Manual

2. Measure:
• Clutch plate warpage
(with a surface plate and thickness gauge
"1")
Out of specification → Replace the clutch
plates as a set.
Thickness gauge
90890-03180
Feeler gauge set
YU-26900-9
Warpage limit
0.10 mm (0.0039 in)
EAS25140

CHECKING THE CLUTCH SPRINGS

The following procedure applies to all of the
clutch springs.
1. Check:
• Clutch spring
Damage → Replace the clutch springs as
a set.
2. Measure:
• Clutch spring free length "a"
Out of specification → Replace the clutch
springs as a set.
Clutch spring free length
52.50 mm (2.07 in)
Limit
49.88 mm (1.96 in)
EAS25150

CHECKING THE CLUTCH HOUSING

1. Check:
• Clutch housing dogs
Damage/pitting/wear → Deburr the clutch
housing dogs or replace the clutch hous-
ing.
TIP
Pitting on the clutch housing dogs will cause
erratic clutch operation.
2. Check:
• Bearing
Damage/wear → Replace the bearing
and clutch housing.
EAS25160

CHECKING THE CLUTCH BOSS

1. Check:
• Clutch boss splines
Damage/pitting/wear → Replace the
clutch boss.
TIP
Pitting on the clutch boss splines will cause
erratic clutch operation.
EAS25170

CHECKING THE PRESSURE PLATE

1. Check:
• Pressure plate "1"
Cracks/damage → Replace.
• Bearing "2"
Damage/wear → Replace.
5-51
CLUTCH