Yamaha MT-09 2021 - Checking the Clutch Plates; Checking the Friction Plates

5-50
CLUTCH
8. Remove:
• Clutch boss nut
• Conical spring washer
• Washer
• Clutch boss
• Thrust plate
• Clutch housing
• Oil pump drive chain
EAS30348
CHECKING THE FRICTION PLATES
The following procedure applies to all of the fric-
tion plates.
1. Check:
• Friction plate 1, 2
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.
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.
2. Measure:
• Clutch plate 1, 2 thickness
(with a surface plate and thickness gauge)
Out of specification → Replace the clutch
plates as a set.
3. Measure:
• Assembly width “a” of the friction plates and
clutch plates
Out of specification → Adjust.
Friction plate 1 thickness
2.92–3.08 mm (0.115–0.121 in)
Wear limit
2.82 mm (0.111 in)
Friction plate 2 thickness
2.92–3.08 mm (0.115–0.121 in)
Wear limit
2.82 mm (0.111 in)
1
2
3
G088993
A. Friction plate 1
B. Friction plate 2
Thickness gauge
90890-03268
Feeler gauge set
YU-26900-9
Clutch plate 1 thickness
2.18–2.42 mm (0.086–0.095 in)
Warpage limit
0.10 mm (0.004 in)
Clutch plate 2 thickness
1.90–2.10 mm (0.075–0.083 in)
Warpage limit
0.10 mm (0.004 in)
Assembly width
42.7–43.5 mm (1.68–1.71 in)