This cylinder I have came with a motor I bought 5 yrs ago, I thought , what the heck, put a piston in it and see what it does. I did not bother to put new reeds in it. Upon inspection of the reeds, one of them has small break forming on the top edge. When I bought this motor, it came with a set of reeds with a stiffener, I assume these would be high tension reeds. The next time I go out, I will try these reeds, see if it makes a difference, I have an extra reed cage that I have already mounted a set of new low tension reeds.