Yamaha R1 Series 2015, Service Manual, Page: 398 / 704

CLUTCH
5-57
• 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
o
Replace the friction plates
as a set.
2. Measure:
•
Friction plate thickness
Out of specification
o
Replace the friction
plates as a set.
TIP
Measure the friction plate at four places.
EAS30349
CHECKING THE CLUTCH PLATES
The following procedure applies to all of the
clutch plates.
1. Check:
• Clutch plate
Damage
o
Replace the clutch plates as a
set.
2. Measure:
• Clutch plate warpage
(with a surface plate and thickness gauge “1”)
Out of specification
o
Replace the clutch
plates as a set.
3. Measure:
• Assembly width “a” of the friction plates and
clutch plates
Out of specification
o
Adjust.
TIP
•
Perform the thickness measurement without
applying the oil.
•
This step should be performed only if the fric-
tion plates and clutch plates were replaced.
•
To measure the total width of the friction plates
and clutch plates, combine 10 friction plates
and 9 clutch plates as shown.
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a. Assembly width adjusted by clutch plate “1”.
b. Select the clutch plate from the following ta-
ble.
Friction plate thickness
2.72–2.88 mm (0.107–0.113 in)
Wear limit
2.62 mm (0.103 in)
Thickness gauge
90890-03180
Feeler gauge set
YU-26900-9
Clutch plate 1 thickness
2.46–2.74 mm (0.097–0.108 in)
Warpage limit
0.10 mm (0.004 in)
Clutch plate 2 thickness
2.18–2.42 mm (0.086–0.095 in)
Warpage limit
0.10 mm (0.004 in)
Assembly width
48.3–49.3 mm (1.90–1.94 in)
a
a