Yamaha F75F - Checking the Connecting Rod Big End Side Clearance; Checking the Crankshaft

Crankcase
7-52
b. Measure the connecting rod small end
inside diameter “b” and big end inside
diameter “c”.
Checking the connecting rod big end
side clearance
1. Measure:
• Connecting rod big end side clearance “a”
Above specification  Check the
crank-
shaft pin width.
See “Checking the crankshaft” (7-52).
Checking the crankshaft
1. Measure:
• Crankshaft journal
diameters “a”, crank-
shaft pin diameters “b”, and crankshaft pin
widths “c”
Out of specification  Replace.
2. Measure:
• Runout
Above specification  Replace.
Connecting rod bolt “1”
1st: 13 N·m (1.3 kgf·m, 9.6 lb·ft)
2nd: 60
Big end side clearance
0.150–0.300 mm (0.0059–0.0118
in)
Limit
0.35 mm (0.0138 in)
60˚
1
c
b
a
T
R
.
.
a
a
Journal diameter
51.980–52.000 mm (2.0465–
2.0472 in)
Crankshaft pin diameter
46.980–47.000 mm (1.8496–
1.8504 in)
Crankshaft pin width
21.00–21.10 mm (0.8268–0.8307
in)
Crankshaft
Runout
0.03 mm (0.0012 in)
Limit
0.04 mm (0.0016 in)
b
c
a