I too am a fan for Michelin tires. I have been running the Macadam 90X on my Fzr for the last 3 years, although they have excellent wear they are a little loose in cool weather. The guys from Mich suggested I go with the TX-15 front and A TX-25 on the rear. They tell me they will heat up much faster than the 90X's. Personally, I think I will try a set of the Pilots next. The size....well if you go to a bigger tire it will make your bike turn in slower and may have a smaller contact patch at extream lean angles. I have heard that the stock 190 Bridgestone is really a 198 tire if this is true, a 200 Pilot would be excellent. I will be picking up my new Hayabusa tomorrow and I am going to try to sell the stock tires and replace them with the Michelins.