I purchased the evans waterless coolant that they use on the race cars and ran it my rhino for one rally, my engine light was on after 10 min of driving the coolant does circulate but does not cool quick enough, I limped my self threw the day, got home went up and down the street to get the light temp light on then heat scanned my rad hose comeing out of the block ( 326 deg) I beleive that the only thing saving the engine is that the coolant does not boil. I draing the system and went with normal coolant and picked up waterweter from the yamaha dealer, then installed a temp gauge now have trouble getting past 160 deg. That is just my experience
How well did you drain your coolant system. If there is any water/antifreeze in the system at all it will not work. Mine works just fine on my 840 Teryx, in the mud with a four seat cage, two adults and two kids. Never see anything over 185deg and the teryx's are notorious for running hot. The fan doesn't even kick in till about 225deg I think. But I had my cooling system completly drained when I put in the BBK.