Leaking radiators ec250
 

My bike has recently started leaking coolant from both radiators. It looks like the fins have split towards the top where they connect to the tanks. There is no signs of damage or impact and it seems like too much of a coincidence why they would all of a sudden start to leak at the same time.

Does anyone know what might have caused this? Maybe broken thermostat?

The radiators are around 6 months old.

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Mostly fins start to leak after radiator gets hit from side and/or is bent. This is because the fins are welded together to form a pipe. If you are 100% sure your rads haven't got a hit then it must be manufacturing fault.