its 104-105 down where i ride. and i ride slow working and what not on deer lease in tall tall grass, mud, swamps, dust, and ive never had a heat issue. but im usually not following anyone, just riding alone. and i don't intentionally put it through deep mud. its all in what you do with it. if mud and water are running through the rad on a bike it is just a matter of time that the cooling effect of the rad will drop. i liken it to this, we have million dollar cat natural gas compressors that go down out here in the gas patch due to the heat, and due to dust being baked onto the radiators on them. Nothing mechanical, no matter what it is or how expensive it is can run when it meets its match, whatever that may be. i don't think the wolverine runs any hotter than any other bike, i don't think heat is an issue. only some like wi_rider have really had what seems to be a problem.. but he seems to be working that out.