So I rode my 650R this weekend up in Pismo Beach for the first time since breaking my scapula back in March. While taking a brief rest about 30 minutes into the first ride of the day, I noticed white smoke coming from the bottom right side of the crankcase. I looked down further and noticed coolant dripping from a hose, then I glanced to my left and noticed fluid in the catch tank boiling like crazy (it was about 1/2 full). I killed the motor and let it sit for a few minutes, fired it up, and was on my way. I was riding sand dunes, so the RPM's were a bit on the high side, but nothing out of the norm, and I did take it easy after that (not getting out of 3rd gear), and fortunately, it didn't happen again. This has never happened before to me on my bike. I've ridden it in 120 degree heat and never had a problem. What do you all think it could have been? All of my fluid levels were good to go.