There isn't a fork brace made for the Valkyrie.
Steering wobble, go back through your setting and measurements.
Something is off and it don't take too much.
+1
Do you have a rake kit on? Darrell made one for my 01 IS when I added the sidecar. What do you mean by wobble? Is it moving you all over the road, or a front end quick shake?
At real slow speeds, if I hit a bump, my front wheel will shake back and forth some rapidly, but the bike does not change directions. It stops in a second or so, without really affecting anything.
MP