People have cut the Cat from the DLX successfully. I am thinking about doing to same to mine.
For some reason people really hate the DLX on the CHinariders forum. I don't really get it - maybe they are annoyed that it needs to be fixed and the answers are not as simple as cleaning the jets. People on here speak of the DLX the way other folks talk about china bikes in general.
You will have much better luck going to the hawk forum on Facebook. Some folks are reprogramming the Delphi system, doing all sorts of stuff to the bike on there.
https://www.facebook.com/groups/hawk250/