Ok, well i recently rebuilt my whole banshee from the crank shaft which is now a 4-mil stroker with bored over pistons, power reeds, FMF SST fatty pipes, SST powercore exhausts and new seals/gaskets all around. Before the rebuild it ran fine and never over flowed.. Mow after the rebuild as soon as I start it the radiator fluid over flows and then eventually stops. Soo I ride it for half an hour or less then let it cool and then it over flows again. what could be the problem..?? I'm thinking i should just buy a new head and head gasket since that's the only thing that's not new besides the clutch basket and gears ..