Checking The Clutch Housing; Checking The Clutch Boss; Checking The Pressure Plate; Checking The Clutch Push Rods - Yamaha WR450FB 2012 Owner's Service Manual

2. Measure:
• Clutch spring free length
Out of specification
springs as a set.
Clutch spring free length
50.00 mm (1.97 in)
Limit
49.00 mm (1.93 in)
EAS25150

CHECKING THE CLUTCH HOUSING

1. Check:
• Clutch housing dogs "a"
Damage/pitting/wear
housing dogs or replace the clutch housing.
TIP
Pitting on the clutch housing dogs will cause er-
ratic clutch operation.
EAS25160

CHECKING THE CLUTCH BOSS

1. Check:
• Clutch boss splines
Damage/pitting/wear
boss.
TIP
Pitting on the clutch boss splines will cause er-
ratic clutch operation.
Replace the clutch
Deburr the clutch
a
Replace the clutch
6-40
2. Check:
• Primary driven gear
Damage/wear Replace the primary drive
and clutch housing as a set.
Excessive noise during operation
place the primary drive and clutch housing
as a set.
EAS25170

CHECKING THE PRESSURE PLATE

1. Check:
• Pressure plate
Cracks/damage Replace.
EAS25190

CHECKING THE CLUTCH PUSH RODS

1. Check:
• Push rod 1 "1"
• Bearing "2"
• Washer "3"
• Push rod 2 "4"
• Ball "5"
Cracks/damage/wear
2. Measure:
• Push rod 1 bending limit
Out of specification
part (s).
Push rod bending limit
0.100 mm (0.0039 in)
CLUTCH
Re-
Replace.
Replace the defective