I think the DR650 steering geometry is a bit "fussy". On my first DR I experimented with some KX 125 clamps I had laying around. These had less offset than the DR clamps. I was hoping to get a more positive / planted feel with the steering but it introduced a waggle in the bars over 100kmh. It never progressed passed a waggle but it was unnerving. My current DR has a DRZ400 front end. No worries at all with this setup.
Keep up the god work.