while i was riding my cbrf2 i hit the throttle and coolant blew out of the hose going from water pump to the oil cooler.when i stopped the res. tank was empty and coolant was leaking from around hose. i tightened the clamp filled it up with more coolant rode it and the same thing happened. seems to be under too much pressure. i have had many issues with this bike,like oil in coolant (this is the worst) bike has new head gasket, water pump, and hoses. after those fixes i found out about the oil cooler o-rings being bad. there were 2 o-ring to replace, so i thought! there are actually 5 o-rings that need replaceing. and my fan stoped comming on because its not registering temp, i think. my gage stops rising when it gets to the top of white line. i can do the work myself i just need the diagnosis.
COULD IT BE AIR IN RADIATOR CAUSING PRESSURE?
COULD IT BE THE THERMOSTAT?
COULD IT BE BENT FINS IN TE RADIATOR CAUSING POOR CIRCULATION AND PRESSURE?
HELP PLEASE!

 

I'm sure Hershey will have good advice though I'm not sure there's enough information to be clear; but it sounds to me that the head gasket is blown again; compression gasses are the only thing that can really build up a sudden massive amount of pressure. On a Ford marine engine I observed something similar but only happened on deceleration. In that case i put the pressure tester on it ,made it happen again and observed 25+ psi on the guage while coolant rocketed out all around the rad cap. Hope this helps!