Thanks for the response Ayrton, you are right in assuming that we warm up the karts much more in the cooler weather. I don’t know of a way to avoid it and I only warm the kart up partially, say 90F. I already use tape on the radiator and cover it with my hand on the warm up lap. I see everyone else in the paddock warming their karts on the stand, and it looks like they use a similar method.
Regarding the steel exhaust mat, from what I have found online, this is for the micro max class only. I don’t currently run the Rotax series, I run in TaG, but I want my kart to stay Rotax legal incase I switch back. Has anyone used different exhaust packing for a Rotax engine ?