needing help

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9/20/2017 1:56 AM

I have a KTM 450 sxf-USA and after about 5 minutes of idling, steam and coolant starts spewing out of the overflow tube. I replaced my radiator cap already and it still does it. Any ideas of why this keeps happening?

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9/20/2017 3:03 AM

Is it coming from the overflow tube or the breather tube?This happened to my dad’s crf450rx after he replaced the stock coolant hoses with some aftermarket ones. He had filled the coolant to the top of the radiator, omce the bike was on and the coolant expanded, coolant started pouring out of the breather hose. The bike basically self regulated how much coolant it needed, we did probably 40 miles and it ran perfectly.

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9/20/2017 3:05 AM
Edited Date/Time: 9/20/2017 3:07 AM

They're not built to idle in place, that's your problem. If you don't use / loose coolant while you're riding, you're 100% fine.

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Washed up moto and enduro weekend warrior.

9/20/2017 3:26 AM

Every modern race 4 stroke with boil coolant and spew if you let it sit and idle........ And your header will glow orange too

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9/20/2017 5:19 AM

In regards to my 2012 KTM 250, it states in the owners manual to not let it sit at idle so that it doesn't over heat/boil over.

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9/20/2017 6:23 AM

5 minutes! Yeah. Don't do that.

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9/20/2017 6:41 AM

you need muffler bearing 2.77"

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scte3.0 pro-line trinity tekin

9/20/2017 7:38 AM

Thats about 4+ minutes too long

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United States of America

9/20/2017 8:41 AM

Quit looking at your bike and go ride.

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9/20/2017 8:49 AM

How's the bike supposed to get an airflow to cool down the coolant if it's just standing there?
That's why Enduro bikes have a fan that's activated at a certain temperature

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9/20/2017 9:54 AM

Much ty...

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9/20/2017 10:53 AM

Your sprocket bolts are too tight. They're squeezing the coolant out.

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9/20/2017 11:04 AM

Can we also suggest that you go lift. Swollen biceps will chill anyone, and anything right the fuck out bro!

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United States of America

9/20/2017 11:57 AM

Make your the choke isn't on. The KTM is in for on and out for off. Opposite of traditional carbs.

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