Well its funny this mileage thing i did a lap on my 400 Honda 2 weeks ago now and i tried to stay as near as the center line where i could . Any guesses as to lenght well to my suprize from start line to start line my bike showed 37.92 miles taking into account my speedo id say its going to be very near dam 37.73 miles if not a wee bit more id love them to measure it before next years races cheersroll on TT 07 all the best for Christmas irish ago.... 8)