Yamaha 25BMH 30HMH Factory Service Manual, Page 314Get this manual
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SHIMMING
(5) Select the pinion gear shim(s) (T3)Calculated numeral at 1100th place more than 1.10 1.20 1.30 1.40 1.50 1.60 1.70 or less 1.20 1.30 1.40 1.50 1.60 1.70 1.83 1.2 1.3 1.4 1.5 1.6 0.7