Press and hold the PTT switch (rider or passenger) to activate the intercom. The intercom icon will turn white (active). The tuner or media volume will mute so the intercom can be heard.
Speak into the microphone. While the PTT switch is held, the microphones will remain active regardless of the VOX setting or sound level.

NOTE

If the CB is turned on, pressing the PTT switch will also activate the CB. Any sound in the microphones will be shared over the current CB channel. Turn off the CB or use the voice activation (VOX) feature if there is a need to communicate privately.
To activate the intercom with only the PTT switch (rather than VOX), reduce the VOX sensitivity to its lowest level. See Intercom → Adjusting Microphone Sensitivity: VOX.