thats a beautiful classic bike. but, i wouldnt dare take that on a track unless i was alone and could go at my own pace without worrying about other idiots
i understand you wouldnt be taking that bike, or any bike, to 200mph, but i suggest you rent or buy the film "Faster" and examine the crashes very carefully, keeping in mind that it could be you flying through the air
http://www.amazon.com/Faster-Ewan-McGregor/dp/B0003JAO5Y/ref=sr_1_1?ie=UTF8&s=dvd&qid=1218766810&sr=1-1
if you really love riding and want the track experience, you should consider buying a second hand 600cc sportbike. it will be a much safer and more satisfying experience
good luck