I haven't picked up my busa yet, but on my ZRX, I found Avon AV tires to do very well. Grip was fine, and I was able to get over 10,000 miles riding across the country. The front profile is a bit too triangular which made the ZRX too twitchy. I like the Pirelli's better. Currently running Michelin Pilot road -I have suddenly developed a vibration at 100mph wich I can't figure out. Tried rebalancing etc, nothing seems to work. I'm checking steering head bearings this weekend and then, who knows.