Yamaha YFM400FAR Service Manual page 450

MIDDLE GEAR
Example:
1) If the bearing housing is marked "–2",
..... a is 4.48.
2) b is 15.0
3) c is 55
4) If the crankcase (right) is marked "75.01",
..... d is 75.01.
5) Therefore, the shim thickness is 0.53 mm.
A = 75.01 – 4.48 – 15.0 – 55
= 0.53
6) Round off hundredths digit and select
appropriate shim(s).
In the example above, the calculated shim
thickness is 0.53 mm. The chart instructs
you, however, to round off 3 to 5.
Hundredths
0, 1, 2
3, 4, 5, 6, 7
8, 9
Shims are supplied
thicknesses.
Middle drive pinion gear shim
Thickness (mm)
G
To find shim thickness "B" use the following
formula:
Middle driven pinion gear shim
thickness:
"B" = e – f + g – h – i – 0.05
– 76 –
ENG
Round value
0
5
10
in the following
0.10 0.30
0.15 0.40
0.20 0.50