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Search the Dirt Rider Forums:YZ250F Overheating
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If your not sitting around long, your coolant is filled to the top of the rad and you know your system is not plugged, then I would check your coolant pump.
It should not over heat or your pipe get red hot if your on the move. -
Hey, I have an '03 YZ250F that seems to be overheating. When I start it up, some coolant pees out, which means it's too hot. The header part of the pipe is red hot after only a little bit of riding. It was not idled too long though, and the radiators were warm. Wondering if it's the jetting, hoses are clogged, or water pump is worn. Please let me know if you have any idea. Thanks
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Yeah, I was going to check that tomorrow, and all the radiator hoses. Thanks
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hey i have a 2008 YZ250F and my exhaust header pipe (comes right out of the engine) glows red hot when the bike idles for only a few minutes, just noticed it after changing the oil. engine coolant is right full does anyone have an idea what is going wrong with my bike??
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start a new thread on this one....
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1998 cr125
its better to own nothing worldly and still have your identity
then have the world and no identity
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Ya, refer to quazy's threadjacker thread lol!1998 KTM 200 EXC
BUFFALO H.S. FOOTBALL FOR LIFE! GO BISON!!!!! -
The cause of this problem is a lean pilot jet - it's common on the 250F's. It is normal for the pipe to glow a dull red after being put under load, or sustained idling, but what you are describing is an overheat condition caused by a lean pilot circuit.**
Here we go again! -
thanks skip i learned something new today.
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1998 cr125
its better to own nothing worldly and still have your identity
then have the world and no identity
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man those 4 strokes... Thats why I ride 2smoke!1998 KTM 200 EXC
BUFFALO H.S. FOOTBALL FOR LIFE! GO BISON!!!!! -
Try using high performance racing coolant. It keeps temperatures down as much as 50 degrees cooler.
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Besides whats been said, ProCircuit and I believe Boysen both make after market water pumps that increase flow and help with overheating. A number of the earlier 250/450F's have a tendancy to overheat when idling or just trail riding.motocross250fHey, I have an '03 YZ250F that seems to be overheating. When I start it up, some coolant pees out, which means it's too hot. The header part of the pipe is red hot after only a little bit of riding. It was not idled too long though, and the radiators were warm. Wondering if it's the jetting, hoses are clogged, or water pump is worn. Please let me know if you have any idea. Thanks.
Dave H
2011 CRF-450R
2006 YZ250 (Son now rides it)
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I have an Overheating problem with my 2009 YZ250F. it has no problem starting up and running, but when im out on the track it feels super hot and then it will stall out. then when i try to kick it over it will not start. i end up walking it back to the truck then wating like 30mins letting it cool, and then it starts but will end up stalling out again and not starting again. Please Help!!
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I have a 2009 yz 250f an it won't idle hard to start dies out on me when I get to low rpms what is the problem someone please help also the pipe glows bright res right after I start it an rev it once or twice
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have you checked the valve lash? if the valves are good then you probably have a blocked pilot jet in the carb. glowing header pipes are normal.
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Winning is 90% rider and only 5% bike, the rest is luck
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