I run pilot road 4 gt's on my bike. I have zero complaints. They just grip, I rode in rain tonight and they just did what they were supposed to. If I really try, I can light up the rear and do a burnout or pull a wheelie, whatever it feels like doing depending on tire temperature. The tires slip when I expect them to, never when I dont expect them to. Braking hard in the rain, no problem, keeping up with an r1 on twisties? No problem.
I do some pretty dumb crap on my bike. I ride with a group of supermotos and I go just about everywhere they go. Dirt, small jumps, grass, whatever. Granted, I've only rolled on pilot roadsz but I see no reason to change, they're spendy, but they are your life line, don't go cheap!
Moral of the story, I ride in everything, every terrain, every speed, every temp, the Michelin Pilot Road 4 GT's are the tire to buy.