Yamaha 25BMH 30HMH Factory Service Manual, Page 318Get this manual
SHIMMING
Example: If is "16.25 mm" and "F" is "+4", then: T117 mm(+4)100 mm16.25 mm .517 mm0.04 mm16.25 mm .51.29 mm (0.051 in) If is "16.26 mm" and "F" is "-3", then: T117 mm(-3)100 mm16.26 mm .517 mm0.03 mm16.26 mm .51.21 mm (0.048 in)
(3) Select the forward gear shim(s) (T1)Calculated numeral at 1100th place more than 1.00 1.10 1.20 1.30 1.40 or less 1.10 1.20 1.30 1.40 1.50 1.0 1.1 1.2 1.3 1.4