I'm sure there are plenty of forums out there for HD.
Here's a couple with some Girth:
http://www.v-twinforum.com/
http://www.vtwintalk.com/
http://www.cyclespot.com/forums/
Here's one for hooking up with biker chicks. [img]/images/graemlins/grin.gif[/img]
http://www.bikerkiss.com/?tid=122