there’s no real way of telling on the road , surface temp , tyre pressure and type of type all make a huge differance … ie: racetecs youc an wheelie in the wet , yet rennsports spin up even if the road is cold …on mine they do anyway
and of course the wheelies are always performed on private roads under controlled conditions
The brand of tyre makes a difference to the time it takes to warm up too. I have Michelin Pilot Power 2CTs and I find they heat up very quickly, after only a couple of miles at a reasonable speed. And yes I have stopped to check the temperature.
6 laps of a “medium sized” roundabout also do a good job after riding for a mile!