kx80 radiator problem

[benjie]

i have a 2000 kx80. the problem is that i start the bike and all the fluid gets pushed out the overflow. i have installed a new top end base gasket, and installed a new radiator cap. within 5 to 10 minutes of riding all the fluid is gone. the bike is running great, i just cant keep fluid in it.

 

[mideastrider]

Sounds like its pressurizing the coolant system from compression from the cylinder.
Must be a head gasket or a crack in the head or cylinder.
Just something to think about

 

[benjie]

thanks for the info. i just changed the head gasket and that was what it was. next time i freshen up the top end i will make sure i always put the new head gasket on. i was in a hurry this time and did not do it. it pays to do things right not fast.
thanks :nod: