Yes... check your bushings, if you haven't ever changed them out, I'm sure they're wore slap out,
and it is an easy fix.
I have 13" HD 440's, I like them... not so much before I got the HD springs.
People really like Works Performance shocks, I find myself wishing I had tried them, that's what
you should get

...
You ride plenty fast, and in the mountains, you need
good action, not just a lack of bottoming out.
Here's some old threads about 412s...
http://www.valkyrieforum.com/bbs/index.php/topic,19690.0.htmlhttp://www.valkyrieforum.com/bbs/index.php/topic,8923.0.html-Mike