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DRIV
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Middle gear shims selection steps:
Shim selection Å
●When the crankcase and/or the drive pin-
ion gear are replaced, be sure to adjust
the drive pinion gear shim Å.
●To find drive pinion gear shim thickness
“A” use following formula:
a= The stamped number on the drive pin-
ion gear is either added to or sub-
stracted from “42”.
b= The stamped number on the crankcase
is added to from “41”.
NOTE:
All stamped numbers are in hundredths of
a mm.
Drive pinion gear shim thickness:
Å = a – b
Example:
1) If the drive pinion gear is stamped
“+02”
.... a = 42 + 0.02 = 42.02
2) If the crankcase is stamped “45”
..... b is = 41 + 0.45 = 41.45
3) Therefore, shim thickness Å is,
Å = 42.02 - 41.45 = 0.57 mm
4) Shim sizes are supplied in the following
thickness:
Because shims can only be selected in 0.05
mm increments, round off hundredths digit
and select appropriate shim(s).
Drive pinion gear
shim
Thickness (mm)
0.15 0.40
0.20 0.50
0.30
Hundredths Round value
0, 1, 2 0
3, 4, 5, 6, 7 5
8, 9 10
MIDDLE GEAR SERVICE
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