Several VTX folks have put those fairings on their X's. The X headlight works just fine (so they say). You may a good bit of infomation on "how to" on the VTXOA site. I find lots of stuff is similar between my VTX and the Valkyrie.
Thanks for the info. I know the VTX will work, I was wondering if it is required or will the Valk headlight work, (just not look as good)