You may have a stuck thermostat. The water shooting out is the result of the increased RPM at the water pump when you rev the motor.
1)is your cooling fan running when warm? Check the fuses and wiring.
2)does it overheat at speed, or when idling? (reverts to the t-stat and the fan).
I would change the thermostat first, and let the bike completly warm up.
A head gasket would show white smoke out the pipes and would drop the coolant level.
My version of the Marbleing
New paint and trim
New oversized front tire
New grip and lever covers
New(er) Ignition switch
A good ride
Wanting attention at all times.
Why should I act my age, I am an ADULT!!!!!!