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JUSTNEIL

boiling antifreeze

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after about ten minutes of riding i here a hissing noise from my radiator and the plastic tank under the rear fender is boiling. when the bike is cool the radiator and plastic tank appear o.k. . :) any thoughts?

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it happens to me from time to time. but it takes more then 10 min and it only happens on when I'm riding the most insane of single track.

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Old coolant?

Radiator fins crushed closed or plugged? Airflow ok?

Is it boiling or is it possible that you have a leaking cylinder and gases are being pushed into the tank?

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I think it was Frostbite who did some investigation into "heating" of the Wr

450.

Pm him for the details, I think by putting "heat-tape" on the the bottom section of the radiator (not over the finned area) it helped it run 350 degrees cooler.

I hope it wasn't a dream.

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If its boiling over in 10 minutes there is isues. I wonder if the radiator cap isn't holding pressure.

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Is it a 50/50 mix of antifreeze to water? If you have too much water/too little antifreeze, you will have a significantly lower boiling point.

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