I am a BIG Valk lover.
What's holding me back from a new Valk 1800 is the handlebars.
I spoke with HELIBARS about what they have that would "fit" The Valk.
As far as diameter of the bar Helibars has several that would fit. The question is: which model will fit best?
I have Helibars on my GL1800 trike and my HD Roadking and they are WONDERFUL!!!
They are easily adjusted to maximize my riding comfort..
Give them a call. They are very accessible and happy to talk to you about your needs.
I think there's plenty of handlebars if you do some kind of giant-riser thing
that allows you to mount them without hitting the key...

Problem is, then you need custom cables and lines and you'll have
to lengthen all the wires and find a way to mount the LED pod and...
http://www.valkyrieforum.com/bbs/index.php/topic,75086.0.html-Mike