I tried 2CTs once when I brought my street bike to the track, they were not fun at all in ideal conditions. I've used Dunlop DOT's in the damp/light rain and was doing pretty good on my 600, no idea of lap times and I'm sure it was slow (third track day) but I was able to get around. If there's a dry line the DOT's will work if its wet then use rains.