yamahaowns

Like many others i have also been having a coolant problem with my banshee. I noticed it kept leaking out of the overflow tube even without getting it hot. It wasn't bad at first but after riding for awhile i started to get puffs of smoke from the coolant spattering all over the pipes. I took some tips on the site and started it cold with the radiator cap off and it shot fluid straight out of the radiator. Does this mean i blew a head gasket? It looked like there may have been some coolant bubbling from under a head bolt? I took the head off and the gasket didn't seem to be damaged to badly. Should i buy a new one, and if so does that mean i need a new head as well or can i put the stock one back on? Also should i be adding coolant to the reservoir under the seat and the radiator? I am new to the site and new to banshees so any help would be much appreciated.