KX500 Resonator port, what is it? What does it do?

[Sandblaster]

A resonator port is not unique to the KX500.... Many dirt bikes have them.
A resonator port helps increase the exhaust port volume which builds bottom end.
The problem is, it kills off some of the top end.
So a resonator port needs to be able to be opened and closed.
Kawasaki did just that through the use of their KIPS valves.
Here is how.

KX500 RESONATOR PORT 101.jpg (302.1 KiB) Viewed 3724 times

KX500 RESONATOR PORT 102.jpg (277.63 KiB) Viewed 3724 times

Here is a pic of the opposite side.
The carbon shows where the port is

KX500 RESONATOR PORT 103.jpg (233.25 KiB) Viewed 3724 times

[Sandblaster]

Here is some info from Kawi

KX500 RESONATOR PORT 104.jpg (72.15 KiB) Viewed 3721 times

KX500 RESONATOR PORT 105.jpg (100.22 KiB) Viewed 3721 times

KX500 RESONATOR PORT 106.jpg (57.92 KiB) Viewed 3721 times