I read all the posts on this subject and was surprised that nobody touched on the key here (rake and trail)of the forks.
Trials motorcycle have their forks clos to vertical for a reason. You get over the centre of the turning circle by standing on the pegs, leaning forward and hip lock your self to the outside of the turn. Now look at the average racing MC or the Thruxton 23 degrees fork rake. Speedmaster 28 degree--America 33.2 degree. These are round number as I didn't want to go back and look them up. This is why the B America has a tendency to fall into a slow turn. Yeah it was built for style and stability on a straight line highway. So knowing this is a bit of a problem we have to be a little more aware of the Americas shortcoming here.
Geoff