Checking The Clutch Boss; Checking The Pressure Plate; Checking The Push Lever Shaft; Checking The Push Rods - Yamaha YZ250FX 2021 Owner's Manual

housing dogs or replace the clutch housing.
TIP
Pitting on the clutch housing dogs will cause er-
ratic clutch operation.
EAM30113

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 er-
ratic clutch operation.
EAM30114

CHECKING THE PRESSURE PLATE

1. Check:
• Pressure plate
Crack/damage  Replace.
EAM30115

CHECKING THE PUSH LEVER SHAFT

1. Check:
• Push lever shaft
Wear/damage  Replace.
EAM30484

CHECKING THE PUSH RODS

1. Check:
1 1
• Push rod 1 "1"
• Bearing/Washer "2"
• Push rod 2 "3"
• Ball "4"
Cracks/damage/wear  Replace.
2. Measure:
• Push rod 2 bending limit
Out of specification  Replace.
EAM30117

CHECKING THE PRIMARY DRIVE GEAR

1. Check:
• Primary drive gear
Damage/wear  Replace the primary drive
and primary driven gears as a set.
Excessive noise during operation  Replace
the primary drive and primary driven gears as
a set.
2. Check:
• Primary-drive-gear-to-primary-driven-gear
free play
Free play exists  Replace the primary drive
and primary driven gears as a set.
EAM30118

CHECKING THE PRIMARY DRIVEN GEAR

1. Check:
• Primary driven gear
5-4
1 1 1
2 2
5 4
Push rod bending limit
0.30 mm (0.012 in)
CLUTCH
4 3