Warning 2013 coolant water is bad

[Larsa]

On my 2013 EC Racing 300 the radiator water on my bike is bad.
There were lumps like sugar law. That make the rubber gasket in the radiator cap was uneven. And started to leak water out of the waste house.
So I had to buy a new radiator cap.
Replace coolant!

[jpgibson]

thanks, I replaced mine. I had the same lumpy green stuff at the cap orifice.

[shang]

Wow! I had some lumps in mine right before I burned it down. I couldn't find anything really wrong with it other than it had zero coolant in it when I tore it down. Interesting. I guess it doesn't matter now but new top end and obviously new coolant and no problems.

[bergerhag]

I had an intresting phenomenon om my 2012 300. Once the pressure in the radiator reached the cap release pressure, it started to leak -as it should. But it never closed again when the pressure dropped. So it just got on boiling the water out. When I applied a bit of high temp grease on the cap seal rubber, it started to behave normal.