I have a 99 yz400F and I do alot of tight trail riding with it. It gets pritty hot when I need to go slow in the tight stuff.I was wondering the best additive that I could put in the radiator to keep the temperature at its lowest? I've been looking in to some of the but I'm not sure whitch one to use? Motor Max,Engine Ice,Water Wetter,40 Below,Be Kool. I don't really feel like buying all of them and trying them out for myself. That would be too much$$. So if anyone out there could shed some light on the subject it would be much appericated. :think