Yamaha 25BMH 30HMH Factory Service Manual, Page 86Get this manual
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SPEC Item REED VALVES Thickness
0.2 (0.0079) mm (in) mm (in) (F) (F) mm (in) 1.72.3 (0.0670.091) 4.55.1 (0.1770.201) 0.2 (0.0079) 4852 (118126) 60 (140) (0.12)
Valve stopper height