Yamaha Rhino 450 YXR45FAV Service Manual page 213

MIDDLE GEAR
b. To find shim thickness "A" use following for-
mula:
Middle drive pinion gear shim thickness
"A" = c – a – b
Where:
a = a numeral (usually a decimal number)
on the bearing housing is either added
to or subtracted from "10.5".
b = drive pinion gear to driven pinion gear
center distance (considered constant
"55").
c = a numeral (usually a decimal number)
on the left crankcase specifies a thick-
ness of "66".
Example:
1) If the bearing housing is marked "+04",
..... a is 10.54.
2) b is 55
3) If the crankcase (left) is marked "66.03",
..... c is 66.03.
4) Therefore, the shim thickness is 0.47 mm.
A = 66.03 – 10.54 – 55
= 0.49
5) Round off hundredths digit and select
appropriate shim(s).
In the example above, the calculated
shim thickness is 0.49 mm. The chart
instructs you, however, to round off 9 to
10.
Hundredths
0, 1, 2
3, 4, 5, 6, 7
8, 9
Shims are supplied in the following thickness.
Middle drive pinion gear shim
Thickness (mm)
4 - 82
ENG
Round value
0
5
10
0.10 0.30
0.15 0.40
0.20 0.50