it's a given if your doing Thunderhill in summer, it's going to be hot. Back when I was doing a lot of trackdays, I rode TH 4 times in 2 seasons, all in summer. It was 95'/98'/101'/108' (in the shade,) each time. In my avatar to
<<<--- the left, it was 108'. In the afternoon, I just PULLED IN when I felt myself getting tired. Typically a lap or two early muscling the big, heavy ZRX around (ain't no sportbike man, work!)
I just alter my plan (you should have one) for the trackday:
A known = hydrate/hydrate/hydrate, bring canopy & stay in shade
do most of your FULL riding/sessions in the morning before lunch
In afternoon, don't do ALL laps, pull in a lap or two early/save strength
IF you get too hot/feel concentration waning, pull in.
READ previous line again.
etc. etc. etc. etc.
It's all common sense, you can do summer trackdays @ TH, just make a solid plan, & stick to it. If you start to feel weak/losing concentration, PULL IN. Use your knoggin' & stay aboard. Listen to what your body tells you. Pull in if your feeling even slightly off. I did.
Kept me aboard...
Ta-daa.....:thumbup :teeth :ride