i've run Bt-014's on the track with no problems and on the street-not bad tires IMO(much better then the stock Duncrap 218's that came on the 04/05 GSXR's
although I like the Pirelli Corsa 3's over any of the tires mentions
(the 2ct's aren't bad though)
I had a very bad experience with the 218's lol (if you still remember)