Re: More track questions
If it's just one day, and you're just getting started with track days, I think you will be fine with 60% in the center and 80% on the sides. They should last at least one day on the track.
It is nice to have fresh tires without a flattened profile to make the bike handle better. If you don't have a bad flat spot in the back or any cupping or scalloping on the front, it will still handle well.
Good street tires are fine for beggining track riders, IMHO. I still use them after 25+ track days on my 929. Some say that stickier track tires are good insurance, but that does not describe the whole picture.
Just because you put on stickier tires does not, by any stretch, keep you from crashing. I haven't crashed yet at the track. No matter which tires you run, you must ride smart and smooth. Tires don't just drop a rider for no reason. It is generally bad input that takes people down.
Yes, you could hit spilled oil or a wild turkey, but other than that, it is your responsibility to ride within your personal limits.
I see people crashing on much stickier tires all the time. Even though they are running 10 seconds a lap slower than me. I just wanted to make the point that no tire will save you from your own mistakes. Other riders have shown me that over and over and over...