Tyre pressures
I don't argue with the advice given, but what F1 tyre technicians do is check the tyre temperature. I do that when racing. So take the bike up the road as you intend to use it, and after ten minutes, stop, and put your hand on the tyres. If they're cold, they're too hard. If the rubber sticks to your hand, they're too soft. Somewhere nearer hot than cold, they're right. I routinely do this when towing a van trailer with a double axle. Including the car, that's eight tyres. I can check that they're all about right in 30 seconds just be putting my hand on them.
For the record, I run my twin, solo, about 26 to 28 front, about 28-30 rear. If it's cold, or wet (which cools the tyres) I might go even softer.