Reed Valves

[joe_indi]

Why dont big saws have them any more?
I opened up a 58cc Zenoah clone last evening. It had an 18" 3/8 chisel chain (Oregon 75LGX)
It had reed valves.
The difference in throttle response was impressive.
Since I have tried the same type of 58cc without reed valves, the response was really different, I would say a good 100%.
I have seen reed valves on the current  smaller top handle saws, and some older Solo saws but this is the first time I am seeing it on a saw of this size after a long time.
Joe

[sawguy21]

I like reed valve saws, they develop strong torque at lower rpm's. The big problems are cost, speed and of course emissions.