Yamaha YZ450F(E) 2014 - Removing the Clutch; Checking the Friction Plates; Checking the Clutch Plates; Checking the Clutch Springs

CLUTCH
5-40
EAS1SL1233
REMOVING THE CLUTCH
1. Remove:
• Clutch boss nut “1”
• Conical washer “2”
• Clutch boss “3”
TIP
While holding the clutch boss with the clutch
holder “4,” loosen the clutch boss nut.
EAS1SL1234
CHECKING THE FRICTION PLATES
1. Check:
• Friction plate
Damage/wear  Replace the friction plates
as a set.
2. Measure:
• Friction plate thickness
Out of specification  Replace the friction
plates as a set.
TIP
Measure it at four points on the friction plate.
EAS1SL1235
CHECKING THE CLUTCH PLATES
1. Check:
• Clutch plate
Damage  Replace the clutch plates as a
set.
2. Measure:
• Clutch plate warpage
(with a surface plate and thickness gauge
“1”)
Out of specification  Replace the clutch
plates as a set.
EAS1SL1236
CHECKING THE CLUTCH SPRINGS
1. Check:
• Clutch spring
Damage  Replace the clutch springs as a
set.
2. Measure:
• Clutch spring free length
Out of specification  Replace the clutch
springs as a set.
EAS1SL1237
Clutch holder
90890-04086
YM-91042
Friction plate thickness
2.92–3.08 mm (0.115–0.121 in)
Wear limit
2.85 mm (0.112 in)
3
4
1
2
Warpage limit
0.10 mm (0.0039 in)
Clutch spring free length
48.00 mm (1.89 in)
Limit
47.00 mm (1.85 in)