Yamaha YFM7FGPW Service Manual page 255

MIDDLE GEAR
e = a numeral (usually a decimal number) on
the left crankcase specifies a thickness of
"9.0"
Example:
1) If the bearing housing is marked "–02",
..... a is 0.58
e
2) b is 17.0
3) c is 55.0
4) If the right crankcase is marked "64.97",
..... d is 64.97
5) If the left crankcase is marked "9.01",
..... e is 9.01
6) Therefore, the shim thickness is 1.40 mm.
"A" = 9.01 + 64.97 – 17.0 – 55.0 – 0.58
7) Round off hundredths digit and select
appropriate shim(s). In the example above,
the calculated shim thickness is 1.40 mm.
The chart instructs you, however, to round
off 0 to 0.
Hundredths
Shims are supplied in the following thickness.
Thickness (mm)
4 - 97
ENG
= 1.40
Round value
0, 1, 2
3, 4, 5, 6, 7
8, 9
Middle drive pinion gear shim
0.50 0.70 1.00
0.55 0.80
0.60 0.90
0
5
10