Checking The Clutch Boss; Checking The Pressure Plate; Checking The Primary Drive Gear; Checking The Primary Driven Gear - Yamaha MT-09 2021 Service Manual

2. Check:
• Oil pump drive sprocket "1"
Cracks/damage/wear → Replace the oil
pump drive chain and clutch housing as a set.
3. Check:
• Bearing
Damage/wear → Replace the bearing and
clutch housing.
EAS30353

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.
G088995
EAS30354

CHECKING THE PRESSURE PLATE

1. Check:
• Pressure plate 1
• Pressure plate 2
Cracks/damage → Replace.
• Bearing
Damage/wear → Replace.
EAS30356

CHECKING THE PRIMARY DRIVE GEAR

1. Check:
• Primary drive gear
Damage/wear → Replace the crankshaft and
clutch housing as a set.
1
Excessive noise during operation → Replace
the crankshaft and clutch housing as a set.
EAS30357

CHECKING THE PRIMARY DRIVEN GEAR

1. Check:
• Primary driven gear
Damage/wear → Replace the clutch housing
and crankshaft as a set.
Excessive noise during operation → Replace
the clutch housing and crankshaft as a set.
EAS30358
CHECKING THE PULL LEVER SHAFT AND
PULL ROD
1. Check:
• Pull lever shaft pinion gear teeth
• Pull rod teeth
Damage/wear → Replace the pull rod and
pull lever shaft as a set.
2. Check:
• Pull rod bearing
Damage/wear → Replace.
EAS30363

INSTALLING THE CLUTCH

1. Install:
• Oil pump drive chain "1"
• Clutch housing "2"
TIP
Install the oil pump drive chain onto the oil pump
drive sprocket "a".
2
a
2. Install:
• Thrust plate
• Clutch boss "1"
• Washer
• Conical spring washer "2"
• Clutch boss nut "3"
5-52
CLUTCH
1
New