I had the ZG on my FZ-1 and it improved airflow quite a bit for me. The "for me" part is the key because everyone's individual size makes all the difference.
There are some positive reviews on the laminar lip over at motorcycle-usa where they put it on a couple of the bikes in their 'Reality bikes' shootout.
There are some positive reviews on the laminar lip over at motorcycle-usa where they put it on a couple of the bikes in their 'Reality bikes' shootout.