Southeast USA typical summer day temp 35 to 37c with heat index in low 40's c. If these bike are tuned well temps no big dealsNot really an answer to your specific question but I live in Queensland, Australia which gets very hot and humid. Never had an issue with heat on my 790 using the Motorex factory coolant.
Yeah, I know the US quite well and where I live in Australia is very similar to the lower part of Florida. No issues with engine temps if the cooling system is properly maintained and no air trapped in the radiatorSoutheast USA typical summer day temp 35 to 37c with heat index in low 40's c. If these bike are tuned well temps no big deals
Same, mine has never gone above 5 bars, even when riding in 45c plus.Had no issues with heat on my 2018 790D. Only seen 5 bars a couple of times even in 40ºC days.
My ex-Triumph was a different matter - That needed relief - I used DEI - as recommended by a tuner in the southern USA.