Checking The Clutch Boss; Checking The Pressure Plate; Checking The Primary Drive Gear; Checking The Primary Driven Gear - Yamaha YZF-R1 2020 Service Manual

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G088994
2. 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.
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

TIP
After assembling the clutch assembly, the noise
like a dry-type clutch might occur with the gear
position in neutral and half clutch. This is due to
the clutch dragging by engine oil when assem-
bled. The pressure plate makes chattering by
the clutch dragging and noise occurs between
pressure plate cam and clutch boss cam. This
noise will disappeared after riding few mileage
as engine oil between clutch plate and friction
plate will be reduced to optimum condition by
clutch operation.
1. Install:
• Washer
• Bearing
• Clutch housing assembly "1"
ECA22570
NOTICE
Make sure to fit the projections "a" of the oil
pump drive sprocket to the concave "b" of
the clutch housing assembly.
TIP
When installing the clutch housing assembly,
turn the crankshaft so that the crankshaft web "c"
cannot be seen.
5-65
CLUTCH

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