rg 125 f -oil in rad

grez · Derestricted Danger Joined: 09 May 2008 Karma :

can somone please help
my radiator suddenly filled with engine oil and the bottom end became noisey(banging).been teken off road but i dont know were to start with it.removed head and cylinder,no visable problems,power valve case is also full of oil(is this normal?)
be gratefull of any replys
thanx

Frost · World Chat Champion Joined: 26 May 2004 Karma :

The power valve cases allways fill up with oil, just drain it regularly and check the valve still moves freely.

Take the cap off the rad and start the bike from cold. water should come out as the bike heats up, not as soon as the engine starts running. If water comes out as soon as the engine is started your head gasket has gone. Take the head off, remove all evidence of gasket and clean the hell out of it. Put a new gasket on and do up the bolts in a cris-cross pattern.