Just thought i would post this. I decided to put this evans waterless coolant NPG+ in my bike and it works great. It is designed to be used without any water and is supposed to last 400,000 miles in a car. I started using it in my F350 powerstroke diesel because it doesnt require additives like the manufacturers coolant does and it is also used as a pressure less system. The boiling point of this stuff is so hi it doesnt require pressure to raise the boiling point of the coolant. They even tell you to drill a hole in the rad cap of your vehicle. Of course i didnt drill a hole in the cap of my YZ450 but i have been using it in my bike now for 3 weeks and have had no boil overs at all. I raced with it last weekend in a GP with no problems. I have used it in my truck for 3 years now and the resevior looks brand new still and doesnt stain like the stock coolant stuff. Just thought I would post this in case anyone else was considering trying anything like this. Oh, and i DO NOT sell this stuff and dont get paid to advertise i promise.