Yamaha VMAX 2009 Service Manual page 388

TIP
Select the middle driven pinion gear shim(s) "2"
by calculating the middle drive pinion gear shim
thickness and then measuring the middle gear
backlash.
a
A
c
1
f
g
e
d
B
2
A. Middle drive pinion gear shim thickness
B. Middle driven pinion gear shim thickness
M MMM M MMM M M MMM M
a. Position the middle gears with the appropri-
ate shim(s) that has had its respective thick-
ness calculated from information marked on
the upper crankcase, middle driven pinion
gear, and bearing housings.
b. To find middle drive pinion gear shim thick-
ness "A", use the following formula.
Middle drive pinion gear shim thickness
"A" = "a" + "b" - "c"
"a"= a numeral on the middle drive pinion
gear bearing housing, to be divided by 100
and added to "14.50"
b
M MMM M M MMM M M MMM M
a
"b"= 57.70
"c"= a numeral on the upper crankcase, to be
divided by 100 and added to "71.00"
c
Example:
If the middle drive pinion gear bearing hous-
ing is marked "7"
"a" is 14.57 (i.e., 14.50 + 0.07 = 14.57)
"b" is 57.70
If the upper crankcase is marked "68"
"c" is 71.68 (i.e., 71.00 + 0.68 = 71.68)
"A" = 14.57 + 57.70 - 71.68 = 0.59
Round off to the hundredths digit and select
the appropriate shim(s).
TIP
In the above example, the calculated number is
0.59. The chart instructs you to round off the 9 to
10. Thus, the shim thickness is 0.60 mm.
Hundredths
0, 1, 2
MMM
3, 4, 5, 6, 7
8, 9
Shims are supplied in the following thickness-
es.
Middle drive pinion gear shim
c. To find middle driven pinion gear shim thick-
ness "B", use the following formula.
Middle driven pinion gear shim thickness
"B" = "d" - "e" + "f" - "g"
"d"= a numeral on the middle driven pinion
gear bearing housing, to be divided by 100
and either added to or subtracted from
"54.55"
5-115
MIDDLE GEAR
Rounded value
Thickness (mm)
0.10 0.15 0.20 0.30 0.40 0.50
0
5
10