Yamaha YFM400FAR Service Manual page 451

h
72.01
MIDDLE GEAR
Where:
e = a numeral (usually a decimal number)
on the bearing housing is either added
to or subtracted from "76".
f = a numeral (usually a decimal number)
on the middle driven pinion gear is
either added to or subtracted from "59".
g = a numeral (usually a decimal number)
on the middle driven pinion gear is
either added to or subtracted from
"79.5".
h = a numeral (usually a decimal number)
on the left crankcase specifies a
thickness of "72.01".
i = a numeral (usually a decimal number)
on the right crankcase specifies a
thickness of "23.87".
Example:
1) If the bearing housing is marked "+02",
..... e is 76.02.
2) If the driven pinion gear is marked "+02",
..... f is 59.02.
3) If the driven pinion gear is marked "+02",
..... g is 79.52.
4) If the crankcase (left) is marked "72.01",
..... h is 72.01.
5) If the crankcase (left) is marked "23.87",
..... i is 23.87.
6) Therefore, the shim thickness is 0.64 mm.
B = 76.02 – 59.02 + 79.52 – 72.01 – 23.87 – 0.05
= 0.64
7) Round off hundredths digit and select
appropriate shim(s).
In the example above, the calculated shim
thickness is 0.64 mm. The chart instructs
you, however, to round off 4 to 5.
Hundredths
0, 1, 2
3, 4, 5, 6, 7
8, 9
– 77 –
ENG
Round value
0
5
10