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Author Topic: yz 125 leaking anti freeze outa the over flow  (Read 3383 times)

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Offline ruskee

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yz 125 leaking anti freeze outa the over flow
« on: March 22, 2011, 06:59:34 PM »
hello my yz 125 is leaking anti freeze outa the overflow pipe it just started doing it and its geting worse any advice??
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Offline MyckMcClung

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Re: yz 125 leaking anti freeze outa the over flow
« Reply #1 on: March 22, 2011, 07:52:51 PM »
Likely causes
your top end is shot,
your water pump is shot, corroded, clogged
radiator hose is pinched
your jetting is too lean
your radiator cap is failiing, not installed right
your oil fuel ratio is too lean on the oil
too hot of a plug
or you need to shift up
If a pair of 2" brass balls isn't working, I doubt that the 3" model will make much difference.

Offline ruskee

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Re: yz 125 leaking anti freeze outa the over flow
« Reply #2 on: March 22, 2011, 08:17:26 PM »
We just put a new top end in because the radiator hose was kinked i think its the water pump myslef just not sure.
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Offline TMKIWI

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Re: yz 125 leaking anti freeze outa the over flow
« Reply #3 on: March 22, 2011, 08:23:52 PM »
Check to see if water is flowing when you take the cap off. You should be able to see the water circulating.
Impellers can brake off the shaft.
If you don't fall off you are not going hard enough

Offline ruskee

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Re: yz 125 leaking anti freeze outa the over flow
« Reply #4 on: March 22, 2011, 08:25:08 PM »
water is flowing.
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Offline TotalNZ

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Re: yz 125 leaking anti freeze outa the over flow
« Reply #5 on: March 22, 2011, 11:35:33 PM »
Blown or incorrectly installed head gasket.
Possibly head studs not tightened down enough after rebuild.

Offline ford832

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Re: yz 125 leaking anti freeze outa the over flow
« Reply #6 on: March 23, 2011, 03:28:06 AM »
X2.Head gasket is the most likely.
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Offline Coop

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Re: yz 125 leaking anti freeze outa the over flow
« Reply #7 on: March 23, 2011, 03:56:13 AM »
X2.Head gasket is the most likely.

Yep that would be my first guess too.
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Offline ruskee

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Re: yz 125 leaking anti freeze outa the over flow
« Reply #8 on: April 13, 2011, 05:14:26 PM »
every one that said blown head gasket was correct geting a new one tomorrow
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