My 09 has 15.5 hours on in now, and yesterday, I was pushing my way through "the bush" behind my house for about 30 minutes to get to an old porcupine tree and the bike started pissing out steam from the front of the case, right in front of the OE glide plate. It did this for about 4-5 (mississippi's) after I shut it down. I let it cool for about 5 mins while walking it back out the way I came. It fired up on the 2nd kick and I lugged it home and put it in the garage asap. After it cooled down I checked the coolant level, it was down 1/4-1/2 inch from the recommended level. Should I top it off with distilled water? Or 50-50 coolant? Or neither? Generally speaking what is the recommended procedure in the future should this happen again?