As @wjwwood mentioned there’s specifically not plans for Kinetic to be built on Bionic Beaver. Target platforms are listed in REP 3
If you want to use Kinetic on Bionic however in general it will work if you build from source.
http://wiki.ros.org/Installation/Source
As an early adopter on an unsupported platform you will likely find some of those issues that the maintainers will triage during the Melodic release cycle.
Another option you may want to look at is running some of your system in a Docker container. http://wiki.ros.org/docker/Tutorials/Docker for things that are not yet released into Melodic.