Bubbles in over flow tank

[matdirt]

When my bike is running I have bubbles in my overflow tank does that mean my head's a junk or at least one of them

[Swanson69]

Hello

I had the same problem before on one of my bikes. After changing both headgaskets, the problem was solved.

greetings from germany
Torsten

[WingAdmin]

Generally bubbles in your coolant indicate a bad head gasket. Get an air compressor and pressurize each cylinder in turn to find out where the problem is, or you can also just do a compression/leakdown test to find the failed cylinder/gasket.