Any Motorcycle Gurus?

I had an '02 VTX1800R model for a while. It wasn't uncommon for people to trade tins or sell desirable colors to swap parts. There were also quite a few people doing custom paint as a service (over the factory paint), including trading the parts out for your 'cores'.
It's also common for motorcycle parts to be completely removed when painted. The VTX is pretty easy to disassemble, and so it wouldn't surprise me if the original paint color is still underneath there somewhere, but typically the filler neck tells the story.