Pashnit makes a great point. With the quality of touring tires becoming better and better with every new model, it's becoming more and more advantageous for us average street riders to use them. Now that most tire manufacturers are offering dual compound tires with a hard compound in the center and soft bubble gum stick on the edges, we have maybe not the best of both worlds but we have a tire that will serve our busa well and cut the cost per mile on tires.
I have always felt it was money well spent for a sticky tire. However, I am about to mount my first set of tires that should give me plenty of stick for what I ask of my busa and double the mileage of my current treads. I am about to mount a BTO16 front and BTO21 (Dual compound touring tire) on the rear. I just can't force myself to use a touring tire on the front but as we all know, we can usually go two rears for each front. With this combo, I can be very confident the front tire is firmly planted and if the rear squirms a bit, I can live with that. This combo should wear both tire out at about the same time and hopefully cut my tire cost in half.
I would NOT run this combo on a track day but street riding should be just fine. One of my riding buddies that currently owns our local track record runs this 16 front and 21 rear and he romps the ass off the corners. But then he is use to sliding both tires through the corners which I wouldn't recommend to the Sunday rider.