Yamaha MT-09 2021 - Checking the Clutch Boss; Checking the Pressure Plate; Checking the Primary Drive Gear; Checking the Primary Driven Gear

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CLUTCH
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.
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.
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. Install:
• Thrust plate
• Clutch boss “1”
• Washer
• Conical spring washer “2”
• Clutch boss nut “3”
1
G088995
1
2
a
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