Your changing too many things at once to diagnose a problem. You stated the problem didn't exist until you installed the dual sport kit. By the way, you can't add a dual sport system without connecting to the factory harness\system at some point. That's where you should have started.
Changing pipe and jetting, vapor lock and new stator are all distractions (and in some cases not the best advise) to solving a simple problem. Best bet in my opinion, to go back to square one, return the bike to the condition it was when you bought it. See how it runs, if there are problems, fix those. Then add one thing at a time and then test. Never change multiple items at once unless you have a clear understanding of the systems effected and their interaction.