Some info;

Length; 4.24km
Direction; Anticlockwise
Elevation; 1350m
Motogp (last year 2004) - Lapped around 1min 30's.
http://www.youtube.com/watch?v=utx4dypsApk
(they do skip some parts of the track)
Our basically superstock-specced regional superbikes lap around 1min42s, and fast A-group guys do it around 1min48s.
My best on the SD is 2m dead, and 1min57 on my old blade, but on road tyres.
This'll be the 2nd time there on the SD, and 4th time ever (3 - including this coming one - were 2 day weekends). Excited? Oh yes indeedee. Hopefully the video camera is working, and I work up the nerve to tape it on the bike, out in the open...