Question about Yamaha YZ 125 Motorcycles

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Water leak/mixing with oil

Water is leaking past the gear selector shaft on my 1987 yz 125 also the water is mixing with the gearbox oil i have drained the gearbox and the oil is milky any help with this would be great thanx heaps Gaz

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  • gazzman79 Mar 10, 2009

    thanks for the info i was stumped on where to start. thanks again

  • Anonymous Mar 31, 2014

    the oil keeps leaking throughout the time in drops. i want to stop it.

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  • 55 Answers

The gasket on the gear shaft is dead. Water runs around it between the outer cover and the gearbox, and unfortunately the gear shaft needs to go all the way through them to get to the 'box. There should be a flat O-shaped gasket around the shaft, and that's leaking water into the oil, and out the side. This is a pretty tough job if you havn't got the right tools, so maybe rather take it to a workshop mate! Hope that helps!

Posted on Mar 10, 2009

  • csurage Feb 04, 2011

    wowwww... i got the same problem

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