Yamaha VMX12 2001 Service Manual page 234

MIDDLE GEAR
b. To find drive pinion gear shim thickness "T",
use the following formula:
Drive pinion gear shim thickness
T = A – B
Where:
A = 54.5 + (constant number)
B = 53 + (a/100)
a = a numeral stamped on the left-side of the
upper crankcase, divided by 100.
If the left-side of the upper crankcase is
stamped "96":
B = 53 + (96/100)
= 53 + 0.96
= 53.96
Therefore:
T = A – B
= 54.5 – 53.96
= 0.54
Therefore, the calculate drive pinion gear shim
thickness is 0.54.
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ENG