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It never hurts to get more charge into the cylinder but the reed valve saws are basically choked down by how much one can get through the reed structure itself, making the cylinder ports larger past the reed cage will not see much if any improvement unless the exhaust port is really restricted/small. Most reed valve saws I have worked over had adequate ports and their mufflers were not restricted. Making larger reed cages, larger reed valves and or changing the steel valves out for more performance  like materials like the Boyesan reeds , single or two stage type helped more than making bigger ports.