This is an odd one. I can't see how the "Air in radiator" should have any effect. The coolant is circulated so there shouldn't be an air bubble in your cylinder jacket. Sounds like the fluid isn't circulating at all and when the air temperature is over 85 not enough heat is being dissipated by the air, so the temperature sensor lights. Also that tank shouldn't be completly full. It should have some room for pressure build up and for expansion.
I think you need to take it back to the dealer and be sure that they fix it before the warrenty expires!!
I have a Super 9 I have run in hot temperatures without any problem. My daily commute is 30 miles each way!