Checking The Crankshaft; Checking The Crankcase Bolt - Yamaha F225F Service Manual

POWR
Connecting rod big end side clearance a:
0.140–0.310 mm (0.0055–0.0122 in)

Checking the crankshaft

1. Measure the crankshaft journal diame-
ters a, crankpin diameters b, and
crankpin widths c.
a
c
b
7-81
Power unit
a
Crankshaft journal diameter a:
72.976–72.996 mm
(2.8731–2.8739 in)
Crankpin diameter b:
52.980–53.000 mm
(2.0858–2.0866 in)
Crankpin width c:
21.000–21.100 mm
(0.8268–0.8307 in)
2. Measure the crankshaft runout.
Crankshaft runout: 0.030 mm (0.0012 in)

Checking the crankcase bolt

1. Measure the diameters a and b of the
crankcase bolt at the specified measur-
ing points c and d, and c and e.
Replace the crankcase bolt if the differ-
ence between the diameters is above
specification.
A
d
b
B
e
A M10
130 mm
B M10
105 mm
Crankcase bolt diameter difference limit:
a – b = Less than 0.20 mm (0.0079 in)
Measuring point c: 10.0 mm (0.39 in)
Measuring point d: 85.0 mm (3.35 in)
Measuring point e: 60.0 mm (2.36 in)
b a
c
a
c