The custom camera, unlike the smart camera, does not swing widely around when you turn, and it stays at a fixed pitch, rise, and back.
There are three settings that affect your custom_camera:
camera_custom_back-- The position of the camera behind the cycle
camera_custom_pitch-- The angle the camera is at
camera_custom_rise-- The height of the camera
You must edit these setting in your configuration files to make them become permanent. If the settings are changed through the console they will be lost upon quit.