Question about 2005 Honda CRF 250 X

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My transmission oil is foaming (2005 CRF250R)

I have a 2005 CRF250R and I recently changed the transmission oil and on the next ride after that my transmission oil foams white and comes out the bottom on the over flow hose and it keep coming until it is bone dry I don't understand if the gas is getting in there or coolant or what's happening PLEASE GIVE SOME LIGHT

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  • robhertdiasc Mar 03, 2009

    On the side of the bike where the clutch is, is that the right place, the oil cames out of a hose on the bottom and the side is foaming is the clutch side I opened the the clutch and the oil is white kind of a thick foam 

  • robhertdiasc Mar 07, 2009

    thank you so much

  • Jim London
    Jim London May 11, 2010

    Hi, This is a four stroke bike not a two and if you put it in where the
    black knob is you put it in the crankcase. The engine is boiling the
    tranny fluid, drain it really good! and replace the filter and put
    correct oil in your bike. You should be fine. Oh and if you think it is
    a two stroke don't mix the fuel either. Need more help?

  • Jim London
    Jim London May 11, 2010

    Hi, there is no overflow hose on a transmission. Where are you putting the transmission fluid?

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  • 46 Answers

Hi,

You have a blown water pump seal, and it is allowing the coolant to mix with the gear oil.
This seal must be replaced or the motor will sieze ant the crank.
Do not run the motor until the repair has been conducted

Cheers

Jon

Posted on Mar 05, 2009

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