Yamaha F400A 2022 - Selecting the Crankshaft Journal Bearing

Cylinder block
7-89
5. Remove:
•Crankcase
6. Measure:
• Width of the compressed Plastigauge
(PG-1)
Out of specification → Replace the crank-
shaft journal bearing.
Selecting the crankshaft journal
bearing
When replacing the crankshaft journal bear-
ing, select the bearing as follows.
1. Check:
• Stamped mark “a” (on the crank web)
• Stamped mark “b” (on the cylinder block)
2. Select:
• Crankshaft journal bearing
T
R
.
.
Crankcase bolt (M10) “1” [1]–[20]
1st: 40 N·m (4.0 kgf·m, 30 lb·ft)
2nd: 90°
Crankcase bolt (M8) “2”, “3” [21]–
[36]
1st: 14 N·m (1.4 kgf·m, 10 lb·ft)
2nd: 28 N·m (2.8 kgf·m, 21 lb·ft)
3
[36][36]
3
3
2
3
3
3
2
[32][32]
[26][26]
[22][22]
[23][23]
[27][27]
[24][24]
[21][21]
[25][25]
[31][31]
[35][35]
[9][9]
[15][15][5][5] [6][6]
[10][10]
[19][19] [20][20]
[30][30]
[28][28]
[29][29]
[33][33][34][34]
[16][16]
[11][11][1][1] [2][2][12][12]
[14][14][4][4] [3][3][13][13]
[18][18][8][8] [7][7][17][17]
1 1
1 1
1 1
1 1
1 1
a
90 °
1
123
Journal oil clearance
0.029–0.053 mm (0.0011–
0.0021 in)
Limit
0.073 mm (0.0029 in)
J1
J5
J4
J3
J2
J1
J2 J3 J4 J5
a
J1 J2 J3 J5
b
J4