Checking The Clutch Springs; Checking The Clutch Housing; Checking The Clutch Boss; Checking The Pressure Plate - Yamaha WR250R Service Manual

EAS25140

CHECKING THE CLUTCH SPRINGS

The following procedure applies to all of the
clutch springs.
1. Check:
Clutch spring
G
Damage → Replace the clutch springs as a
set.
2. Measure:
Clutch spring free length
G
Out of specification → Replace the clutch
springs as a set.
Clutch spring free length
41.20 mm (1.62 in)
Limit
39.14 mm (1.54 in)
EAS25150

CHECKING THE CLUTCH HOUSING

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

CHECKING THE CLUTCH BOSS

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

CHECKING THE PRESSURE PLATE

1. Check:
Pressure plate "1"
G
Cracks/damage → Replace.
EAS25190

CHECKING THE CLUTCH PUSH RODS

1. Check:
Push rod "1"
G
Push rod "2"
G
Ball "3"
G
Cracks/damage/wear → Replace.
2. Measure:
Push rod bending limit
G
Out of specification → Replace the defective
a
part (s).
5-39
1
3
2
Push rod bending limit
0.100 mm (0.004 in)
CLUTCH