My UK 2014 ES handbook states exactly word for word what Sierra 1 has quoted.
Myself as i'm around 6ft 4in & 280kgs weight mark, fully kitted up, i've run mine at the settings quoted in the book. So far i'm very happy with wear, grip, wet & dry.
Since i retired from work, where i used to ride all most every working day, subject to the weather, H&S crap happened, then it was in a car instead. We use to have to sign our lives away that we had checked the STATED Tyre pressures, Any thing more than a 5% drop on there gauge, and we had to get it checked out. Nothing else was allowed, Oil, Water, the same. We where even Audited on our own checks.
There where some cases that i was dealing with, where certain insurance claims where rejected, due to the car/bike Tyre pressures that where more than 20% down from the stated makers pressures settings.
Ride safe guys eh.