when i still road raced motorcycles. i had to use waterwetter. u could not use real freeze on the track. water and water wetter. it was a 99 yamaha r6. i endurance raced it. we were only supposed to use like an oz. of wetter per quart. on my bike. it did nothing as in lowering my temps. gauge was always the same. with or without it. and for the blue stuff. in my grizz. as of now. its done nothing to lower any temps. but my radiator is very beat'n up from mud running. my fan runs as much now as it did. my temps are no different it seems. its still in there. next time. i think ill just use good old prestone. but. i am going to go with a larger rad mounted on my front rack. for mudding purposes.. or the hilifter three pass rad. im sure would do the trick. the heat that comes off these engines, and exhaust in that boxed in area under the tank, is emense. and i feel wrapping ur exhaust with header heat wrap, would be a bennefit. but i dont know how it would hold up to alot of mudding. and glychol does raise the boiling point. and the pressure in your cooling system also raises the boiling point of the coolant. just plane old water will boil before glychol. and the heat generated under the grizzlys tank. will also cause them to vapor lock.. it boils the fuel in the carb. ive even seen the fuel bubble in my tank. its alot of heat in there. but i would not just run water.. then u have no freeze protection. it gets cold where i live. i ride in the winter. and i dont want to have to drain my atv every winter. so if ur getting hot. try the hilifter three pass. bet it wont over heat then..just remember there is no miracle in a can.. the rad still has to be efficient of getting the heat out. personaly id stick with plain old antifreeze. its worked for how long now.

 

Not sure, but since the radiator volume and surface area are greatly reduced wouldn't that offset the block/water surface area? I believe it would.