overheating under load

[sarahscottt]

1986 helix runs great comes up to running temp sitting still no problem,after riding under load two miles temp guage goes all the way up and antifreeze comes out of reserve cover.Stop for one minute start riding again temp down to 3 bars but everytime you excellerate it blows antifreeze out of reserve tank cover.Head gasket ???already replaced thermastat,radiator cover ,checket water pump,flushed system removed radiator and flushed,soaked ,blew out,been to dealer they worked on it could not figure it out.11,000.mi I NEED HELP

[trying59]

Head over to on of the two yahoo helix groups.   I really dought this but any chance of one of the old hoses being collapsed inside???   it's happen to me on cars before buying a replacement thermostat that the new one is bad.    leave me wondering if there is something really stuck in the system.   The only time I ve ever since the like is in a car with a bad thermostat.     A bad head gasket means the there going to be water i the old with bubbles  .   On goldwing I ve seen the eletirical  themal switches go bad.   I think there is two.        But as I said your best bet is on of the 2 helix groups on yahoo.com 

[trying59]

one more thing and any auto place can do it for you.  Pressure test you system.   can tell if there is leaks in the system etc.   They just take the cap off and stick this tool in it's place and pump it up.