Removing The Clutch; Checking The Friction Plates; Checking The Clutch Plates - Yamaha YZF-R1 Series Service Manual

EAS30346

REMOVING THE CLUTCH

1. Remove:
• Clutch cover
• Gasket
TIP
Loosen each bolt 1/4 of a turn at a time, in stag-
es and in a crisscross pattern.
After all of the bolts are fully loosened, remove
them.
2. Remove:
• Compression spring bolts
• Pressure plate 1
• Compression springs
• Pressure plate 2
• Pull rod
3. Remove:
• Friction plates 1
• Clutch plate 1
• Clutch plates 2
• Friction plates 2
• Clutch damper spring
• Clutch damper spring seat
TIP
Be sure to mark the friction plates and clutch
plates or note the position of each part so that
they are installed in their original positions.
4. Straighten the clutch boss nut rib "a".
a
G088991
5. Loosen:
• Clutch boss nut "1"
TIP
• While holding the clutch boss "2" with the uni-
versal clutch holder "3", loosen the clutch boss
nut.
• Do not use an impact wrench for removing the
clutch boss nut.
Universal clutch holder
90890-04086
Universal clutch holder
YM-91042
3
G088993
6. Remove:
• Clutch boss nut
• Conical spring washer
• Clutch boss
• Thrust plate
• Clutch housing assembly
• Bearing
• Washer
EAS30348

CHECKING THE FRICTION PLATES

The following procedure applies to all of the fric-
tion plates.
1. Check:
• Friction plate 1 (blackish shoe)
• Friction plate 2 (whitish shoe)
Damage/wear → Replace the friction plates
as a set.
2. Measure:
• Friction plate 1, 2 thickness
Out of specification → Replace the friction
plates as a set.
TIP
Measure the friction plate at four places.
Friction plate 1 thickness
2.72–2.88 mm (0.107–0.113 in)
Wear limit
2.62 mm (0.103 in)
Friction plate 2 thickness
2.72–2.88 mm (0.107–0.113 in)
Wear limit
2.62 mm (0.103 in)
EAS30349

CHECKING THE CLUTCH PLATES

The following procedure applies to all of the
clutch plates.
1. Check:
• Clutch plate 1, 2
Damage → Replace the clutch plates as a
set.
5-64
CLUTCH
1
2