it sucks being out in the middle of nowhere and boiling over!! Than you have to put water in the rad diluting the coolant even more. Thats why I run the evans coolant in the yz. I have never boiled over and can still tell when the bike is getting hot.
I never loose that much coolant when i boil over. last few times when i let the bike cool down and check i can still see it at the top. Then later when at the truck or what not it dont take much more to fill it.
i have boiled over 2 times without flushing and putting new coolant in tho so i think its time to do that