The problem with this subject is that for everyone who knows what they're talking about, there are 75 hoopleheads just flappin' their lips.
From the Pirellimoto website:
For any other unanswered questions, or if you simply want to speak to
a Pirelli employee, please telephone us at the number below:
-- Customer Support --
Tollfree: 1.800.747.3554, option 4 (followed by #)
Please be sure to have information about your tires/motorcycle
in front of you, including tire model, date codes and tire sizes.
The tire companies have technical staff that will be happy to talk to you, because they want you to use their tires on every vehicle you have.
Get the baseline from this guy, and then read Abtech's posts on the 20% rule. You'll become an expert, and you'll know how to get this question answered for your riding, your setup, your weight, road or track.
And remember, we can have the best tires, properly inflated and heated, our suspension perfectly set up, and still take a tour de asphalt because we didn't exercise judgment and control. It isn't always the fault of the tire, I dont care what they say on every single motorcycle forum in this universe!