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KX125 1999 coolant problems


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I had issues recently with water leaking into the gear box. I changed the seals behind the impeller, and when I rode it next , it was overheating massively. I was loosing coolant though the overflow pipe almost immediately. Unsure as where to go from here!

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How much coolant did you lose? I almost always overfill mine a bit. It pukes out what it doesn't need. Also replacing old radiator caps is a good idea. What condition are the radiators in? Might be clogged up a bit. Smashed fins, cooling fins full of dirt, or years of gunk inside. Most people rarely give the radiators or cap any love...for years.

Edited by bowhunter007
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I'm putting in a lot each time. I've had the water pump cover off and the impeller is spinning freely. Radiators are ok. I'll swap the radiator cap with my 250f and see if that makes a difference. I'll get it filled again and see if the coolant is circulating ok too.

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