To grnmtvt, It was really hot and the track is also used for cars and they leave a lot of rubber on the surface. My tires were a gooey mess. I will try and figure out how to post a photo we took after the first day. As funky as they looked, all that rubber held like glue. I had no problem using the full radius of the tire but without more body hang my corner speeds were limited. I found that the XR will lean pretty well but it tend to want to sit up and rather than hold a tight line. That impression doesn't surface on the roads.
Thunderbolt Raceway, named after the P-47's that were built and trained on that site in New Jersey, is a short course with 12 corners so no blazing speeds. Also, CA Superbike tapes over the dash, we had no data on speeds. I am guessing that by the time I was at 105 mph at the Start/finish straight I was mostly concerned with getting in and out of Turn 1. I rode with the shield down. I have had the XR up to 130 mph without experiencing that wobble. But this bike seems more about 20-100 than the top end.
To Gilly76, I am leaning that direction. There is a demo XR, with full exhaust and tune available at my dealer. My garage is getting full, can't part with my 2013 GSA oil cooled bike.