Checking The Friction Plates - Yamaha YZF-R25 Service Manual

EAS30346
REMOVING THE CLUTCH
1. Remove:
• Clutch cover "1"
• 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 "1"
• Compression springs "2"
• Pressure plate "3"
• Pull rod "4"
TIP
Loosen the compression spring bolts in stages
and in a crisscross pattern.
3
3. Remove:
• Friction plates 1
• Clutch plates
• Friction plates 2
4. Straighten the lock washer tab "a".
5. Loosen:
• Clutch boss nut "1"
TIP
While holding the clutch boss "2" with the univer-
sal clutch holder "3", loosen the clutch boss nut.
1
EAS30348

CHECKING THE FRICTION PLATES

The following procedure applies to all of the fric-
tion plates.
1. Check:
• Friction plate
Damage/wear → Replace the friction plates
as a set.
2. Measure:
• Friction plate thickness
2
Out of specification → Replace the friction
plates as a set.
TIP
Measure the friction plate at four places.
1
4
a
5-52
Universal clutch holder
90890-04086
Universal clutch holder
YM-91042
3
Friction plate thickness
2.92–3.08 mm (0.115–0.121 in)
Wear limit
2.82 mm (0.111 in)
CLUTCH
1
2