Yamaha XVZ13TF 1999, Service Manual

Page: 391 / 501

7-88
FINAL DRIVE
CHAS
Final drive pinion gear shims
Thickness (mm) 0.30, 0.40 0.50
Where:
a
= a numeral (positive or negative) on the ring
gear, to be divided by 100 and added to “87”
b = a numeral on the final drive housing, to be
divided by 100 and added to “86”
Example:
If the final drive pinion gear is marked “+01” and
the final drive housing is marked “50”:
A = (87 + 1 / 100) - (86 + 50 / 100)
= (87 + 0.01) - (86 + 0.05)
= 87.01 - 86.50
= 0.51
Therefore, the calculated final drive pinion gear
shim thickness is 0.51 mm.
Shim sizes are supplied in the following thick-
nesses.
Since the final drive pinion gear shims are only
available in 0.10-mm increments, round off to
the hundredths digit.
Hundredths Rounded value
0, 1, 2, 3, 4 0
5, 6, 7, 8, 9 10
In the example above, the calculated final drive
pinion gear shim thickness is 0.51 mm. The
chart instructs you to round off the 1 to 0. Thus,
you should use a 0.50-mm final drive pinion
gear shim.
c. To find ring gear shim thickness “B”, use the
following formula:
Ring gear shim thickness
B = (45 +
c
/ 100) + (3 + d / 100) -
[(35.40 +
e
/ 100) + f]
Where:
c
= a numeral on the final drive housing, to be
divided by 100 and added to 45
d = a numeral usually on the outside of the ring
gear bearing housing, to be divided by 100 and
added to 3
e
= a numeral (positive or negative) on the in-
side of the ring gear, to be divided by 100 and
added to “35.40”.
f = the ring gear bearing thickness constant