After a good day of riding 9hrs or so. i stopped and realized the bike was running hot but the exhaust was normal and then i slowly saw the exhaust turn to a white smoke. I reached back and my glove was soaked with coolant i shut it off. My friend ran back to the truck got some water, started it and you could just see the water coming out of the exhaust midpipe. This is a newly rebuilt motor, and I still have good compression,. Is it likely that the head/base? gasket went bad? Pretty sure you cant install the gasket upside down. Thanks any help is appreciated.