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AR15.COM
6/13/2014 6:28:19 AM EDT
I have a few kayfuns but just recently bought  THIS 3.1/, problem is when I take a hit it sounds like I am blowing a damn whistle. How can I fix that, it is driving me nuts.
6/13/2014 6:38:20 AM EDT
[#1]
Quoted:
I have a few kayfuns but just recently bought  THIS 3.1/, problem is when I take a hit it sounds like I am blowing a damn whistle. How can I fix that, it is driving me nuts.
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That's not a Kayfun 3.1. It's a Kayfun Lite Plus. Whistling is extremely common on the KFL and KFL+ due to their constricted airflow (compared to the 3.1). You can see if drilling out the airflow hole on the side helps (remove the center pin BEFORE you do this), and/or chamfering the outside of the airhole sometimes helps. Also check that the center pin's airflow holes are lined-up with the outside air hole.

You can mess with the airflow adjustment screw as well - some people take it out all together.
6/13/2014 6:57:50 AM EDT
[#2]
I though about chamfering the outside...will give that a try.
6/13/2014 7:22:49 AM EDT
[#3]
Quote History
Quoted:
I though about chamfering the outside...will give that a try.
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That's worked well on other devices besides the kayfun.

Works well on drippers that have been bored out too.