I have 2 x old Suzuki 3 cyl heads here.
1 x cyl head has F5A written on it with a paint pen.
The other cyl head looks the same and has F5A cast on the cyl head.
Today I measured the valves in both heads with digital verniers and got the following:
Inlet valve dia = 31.60mm
Exhaust valve dia = 28.4mm
It was hard to measure as the valves are still in both heads but I am quite close.
I cannot find valve sizes for F5A on the net (I looked last night).
I only found valve sizes for F8B and they are as follows:
Inlet = 31.6mm
Exhaust = 27.6mm
The question is simple - what are the 2 x heads in my shed???
Have a good week all + m/boy on!!!!
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