Yamaha F400A 2022 - Checking the Crankcase Bolt; Checking the Big End Oil Clearance

Cylinder block
7-83
2. Measure:
• Runout
Out of specification → Replace the crank-
shaft.
Checking the crankcase bolt
1. Measure:
•Diameter
Above specification → Replace.
TIP:
Measure the diameters “a” and “b” of the
crankcase bolt (M10) at the specified measur-
ing points “c” and “d”.
Checking the big end oil clearance
TIP:
Clean the mating surfaces of the parts in ad-
vance.
1. Install:
Crankshaft pin bearings “1” (into the con-
necting rod “2” and connecting rod cap
“3”)
TIP:
Install the crankshaft pin bearings in their orig-
inal positions.
Journal diameter
72.976–72.996 mm (2.8731–
2.8739 in)
Crankshaft pin diameter
62.980–63.000 mm (2.4795–
2.4803 in)
Crankshaft pin width
21.00–21.10 mm (0.8268–
0.8307 in)
Runout
0.03 mm (0.0012 in)
Limit
0.04 mm (0.0016 in)
a
b
c
Crankcase bolt diameter differ-
ence limit
“a” – “b” = Less than 0.20 mm
(0.0079 in)
Measuring point “c”: 10.0 mm
(0.39 in)
Measuring point “d”: 65.0 mm
(2.56 in)
c
b
a
d