Yamaha F25 [258/444] Shimming except for usa and canada

6-26

LOWR

SHIMMING (EXCEPT FOR USA AND CANADA)

4. Calculate:

● Pinion gear shim thickness (T3)

NOTE:

● “P” is the deviation of the lower case

dimension from standard. It is stamped

on the anode mounting surface of the

lower case in 0.01 mm units. If the “P”

mark is missing or unreadable, assume a

“P” value of “0”, and check the backlash

when the unit is assembled.

● If the “P” mark is negative (–), then add

the “P” value to the measurement.

Example:

If M is “28.30 mm” and “P” is “+5”, then:

T3 = 28.30 mm – 27 mm – (+5)/100

= 1.3 mm – 0.05 mm

= 1.25 mm (0.049 in)

If M is “28.24 mm” and “P” is “–3”, then:

T3 = 28.24 mm – 27 mm – (–3)/100

= 1.24 mm + 0.03 mm

= 1.27 mm (0.05 in)

Pinion gear shim thickness (T3) =

M – 27 mm – P/100 mm

5. Select:

● Pinion gear shim(s)

Calculated numeral

Shim size to

use

More than

or less

than

1.10 1.20 1.2

1.20 1.30 1.3

1.30 1.40 1.4

1.40 1.50 1.5

1.50 1.60 1.6

1.60 1.70 0.7 + 1.0

1.70 1.83 0.7 + 1.1

Available shim thickness:

0.7, 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, and

1.6 mm