All 2st What is the OEM coolant?

Or more importantly, is it compatible with good ol' distilled water?
I boiled over my WR the other weekend and it needs to be topped off.

Yeah, I'm thinking the same thing. The only 2 stroke I've ever seen puke coolant is my buddy's '08 KTM 300 XC. One of the first things I do with all my new bikes is dump the OEM coolant and replace it with Engine Ice followed by 2 or 3 capfuls of Water Wetter. With that combo, I've never boiled anything except my KTM 4 strokes (which would puke coolant if they were running on glaciers in Antarctica).

Sorry about the lack of searching!
Is the G12some crazy waterless coolant or can it be topped off with water? Anyone know?

It boiled over a little easier than I thought it should. In its defense, we were about 2 miles in on a trail that had yet to be cleared, so lots of clutch work and slow speeds during the log hopping session. And it was in the upper 80's that day.

My buddies 450R Honda was like a screaming steam pot. My WR was barely spitting it out. I probably wouldn't have noticed, but I saw some blue stuff on the skidplate.

Thank you!