Checking The Clutch Springs; Checking The Clutch Housing; Checking The Clutch Boss - Yamaha 2009 YZF-R1 (Y) Service Manual

Clutch plate "1"
Part No.
4B1-16324-00 1.6 mm (0.063 in)
5VY-16325-00 2.0 mm (0.079 in)
4B1-16325-00 2.3 mm (0.091 in)
Clutch plate "2"
Part No.
5VY-16325-00 2.0 mm (0.079 in)
4B1-16325-00 2.3 mm (0.091 in)
TIP
When adjusting the clutch assembly width [by
replacing the clutch plate(s)], be sure to
replace the clutch plate "1" fast.
After replacing the clutch plate "1", if specifica-
tions cannot be met, replace the clutch plate
"2".
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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
43.80 mm (1.72 in)
Limit
41.61 mm (1.64 in)
Thickness
STD
Thickness
STD
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.
5-65
CLUTCH