Don't act like you know what you are talking about when you ask a question. The pressure is always take on a cold setting. Now however, obviously, if you check it cold when its 90 degrees outside and then the ambient temperature drops to 50 in a few weeks, you need to recheck but only as a reference when it's hot. There is not going to be a great big difference, so obviously, in a pinch, just do it what ever it says in the manual till you can check and readjust cold. Check regular and learn to eye ball ever time you get on.
I am obviously an expert here..so in brief, cold to the posted amount for the front and back that is labeled on your post. And it's truly a great idea to have two gauges to double check them against each other once in a while.

 

All my rides have TPMS. The psi swings can move around a good bit with temps and road conditions. When a bike tire says 41 psi max cold, and summer conditions have it over 50 psi, I just don't like it. A common summer cold setting may be 36 - 38 and then the hot extreme reading may reach around 45 or so, I can live with that a little better.
BTW my Dunlops are still very hard even at 36, no soft feel at all. To each their own.
On my other vehicles, I check tread wear across the tire and adjust the psi accordingly. Even wear on them is my goal. It varies from one vehicle to the other, as well as with different tires.
Go with what feels right, wears right, and performs right for your given preferences.

 

Space shuttle tires used to get pretty darned hot... I'd dare guess a LOT hotter than your motorcycle tires are likely to get.

They always check them, inflate them, and set the pressure when they're cool or cold.

 

Your tire pressure can vary by a few pounds depending on how much water is in the air when the tire was inflated. The harder you push it the bigger the difference from your buddy's if you compare if one has dry air and the other wet air.

 

 

I still say those tire gauges are way off!

 

You guys have been......... so trolled......

 

Geez, check the pressure cold and ride. Too much overthinking going on. The air we breath is 78 percent nitrogen. That's enough nitrogen for my lungs, so it's enough for my tires too.

 

If you ride at different altitudes you must have one of them new-fangled flying motorcycles. Mortals like us ride at different elevations.

Thought I'd make the distinction, since you're all about the science.

ps. this smells like a MikerR1 thread

 

I was taught that you want about a 10% increase in pressure from cold to hot. any more then that your pressure is too low. Back in the rigid frame chopper days I would drop pressure in the rear until the cornering got squirrely , then add a couple pounds - then check it in the morning for a cold reading - Eastcoast Jim