Checking The Clutch Springs; Checking The Clutch Housing - Yamaha YZF-R1 Series Service Manual

2. Measure:
• Clutch plate 1, 2 warpage
(with a surface plate and thickness gauge)
Out of specification → Replace the clutch
plates as a set.
Thickness gauge
90890-03268
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)
3. Measure:
• Assembly width "a" of the friction plates and
clutch plates
Out of specification → Adjust.
Assembly width
48.3–49.3 mm (1.90–1.94 in)
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.
a
a. Assembly width adjusted by clutch plate
"1".
b. Select the clutch plate from the following
table.
Part No.
2CR-16325-10
2CR-16325-00
2CR-16325-20
EAS30351

CHECKING THE CLUTCH SPRINGS

The following procedure applies to all of 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.
Clutch spring free length
47.36 mm (1.86 in)
Limit
44.99 mm (1.77 in)
EAS30352

CHECKING THE CLUTCH HOUSING

1. Check:
• Clutch housing dogs
Damage/pitting/wear → Deburr the clutch
housing dogs or replace the clutch housing.
a
TIP
Pitting on the clutch housing dogs will cause er-
ratic clutch operation.
5-65
CLUTCH
Clutch plate "1"
Thickness
2.0 mm (0.079 in)
2.3 mm (0.091 in)
2.6 mm (0.102 in)
1
STD