You could be right !
I didnt even know the NAV 5 had a temp readout and if it does ( i have no reason to doubt you) is it not linked to the bike anyway as part of the data share between bike and Nav ?
Even so it must be in settings and measurment options ?
Settings measurement are crap, if you select km you get deg C but if you set miles you get deg F. It just annoys me that for a £600 plus unit you can't fine tune the settings.
However what a bike!!! Never had so much fun with my trousers on! 1st service on 22nd. Yes it has a few minor niggles but you don't have time to think about them, and the quick shifter? Always considered it a gimmic but how wrong I was?