Well over the summer I had to top off the coolant bottle a few times. I could never find a source of a leak, until a week ago. I was out sweeping my garage (raining out) and noticed a drop of coolant under my bike. Upon closer inspection I noticed coolant running out of the spark plug well drain hole. I pulled out the plug wire, the one furthest from the cam drives, and it was covered in coolant. So a trip to the dealer. Their conclusion is basically a porous casting. I asked if this has happened before. Their response was simply "no". So now I am waiting for a new head to come from Japan, should be here next week. At least the riding season is basically over.:thumbup: