needing help

zack0
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zack0
Edited Date/Time 9/22/2017 9:31pm
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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jrrundle
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jrrundle 9/20/2017 3:03am
9/20/2017 3:03am
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.
MxKing809
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MxKing809 9/20/2017 3:05am
9/20/2017 3:05am Edited Date/Time 9/20/2017 3:07am
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.
lumpy790
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lumpy790 9/20/2017 3:26am
9/20/2017 3:26am
Every modern race 4 stroke with boil coolant and spew if you let it sit and idle........ And your header will glow orange too
MudPup545
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MudPup545 9/20/2017 5:19am
9/20/2017 5:19am
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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Forty
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Forty 9/20/2017 6:23am
9/20/2017 6:23am
5 minutes! Yeah. Don't do that.
dsmith
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dsmith 9/20/2017 6:41am
9/20/2017 6:41am
you need muffler bearing 2.77"
Camp332
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Camp332 9/20/2017 7:38am
9/20/2017 7:38am
Thats about 4+ minutes too long
colintrax
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colintrax 9/20/2017 8:41am
9/20/2017 8:41am
Quit looking at your bike and go ride.
crusty_xx
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crusty_xx 9/20/2017 8:49am
9/20/2017 8:49am
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
omalley
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omalley 9/20/2017 10:53am
9/20/2017 10:53am
Your sprocket bolts are too tight. They're squeezing the coolant out.
Camp332
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Camp332 9/20/2017 11:04am
9/20/2017 11:04am
Can we also suggest that you go lift. Swollen biceps will chill anyone, and anything right the fuck out bro!
CarlinoJoeVideo
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CarlinoJoeVideo 9/20/2017 11:57am
9/20/2017 11:57am
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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