I have the same issue, the headlight (was unrelated actually) has since been fixed. Follow this thread, maybe it will help, particularily the one about the connector under the battery box. I have not yet had time to follow up and my radio is still dead. Everything else works great, just no radio or dash (fuel gauge works). I hope to diagnose this weekend and will post my results if I am able to find anything.
http://www.valkyrieforum.com/bbs/index.php/topic,5211.0.html