Question about 2002 Yamaha YZ 426 F

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Water leak/mixing with oil

Heya i have a prob with water leaking out past the gear select shaft on my 1987 yz 125 also the water is mixing with oil in gearbox i have drained oil and is milky what are my options

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Change the seal behind the water pump impeller
the shifter shaft seal will stop leaking
if it continues to mix water and oil you will have to change the head gasket

Posted on Apr 13, 2009

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Looking at the parts diagram it appears the impeller is threaded onto the shaft on the YZ250....hope that helps, heres the parts diagram
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It is normal for the powervalves to leak, but it does depend on where it is leaking from.

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Jan 27, 2010 | 2004 Yamaha YZ 125

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May 25, 2009 | 2004 Yamaha YZ 250

1 Answer

IM TRYING TO FIGURE OUT HOW TO REMOVE IMPELLER TO REPLACE SEAL 2001YZ 125 LEAKS WATER


The impeller screws onto the impeller shaft. Go to the site below and you can see a parts diagram. You will select the brand, year, model, etc... It has the part numbers and prices.
http://www.babbittsonline.com/pages/parts/viewbybrand/1/Yamaha.aspx

There are actually two seals. Are you sure the leak is a bad seal and not the water pump gasket or a cracked/broken housing cover?

Please post a top rating for this solution. Thanks! :)

May 19, 2009 | 2004 Yamaha YZ 125

1 Answer

1997 yamah yz 125 lots of white smoke comeing out of pipe


How much was it smoking previously? Too much smoke (oil) is a whole lot better than not enough smoke (oil). If you are mixing the oil and gas then cut back on the mixture. Obviously it is out of balance. Put 1/2 gallon of raw gas in the tank to cut the mix. After a tank or so you should get the balance back.

You need a new shift shaft and probably need a new shift lever due to the bad splines. You can try the JB Weld but I suggest that you go ahead and drill the lever an shaft then put in a cold roll split pin from the hardware store. You have nothing to loose since the shaft and the lever are already toast.

Please rate this solution. Thanks!

May 01, 2009 | 2003 Yamaha YZ 125

3 Answers

Oil is a grey colour in the engine of my yz 125 2001


Your bike is water cooled. Some of that water is leaking into the gear box. The cylinder gasket is the likely leak. I would let the shop take a look at it instead of trying to fix it yourself.

But be sure there is not an external source for the water. Do you wash the bike often? Ride the creek bed often? Leave the bike where the lawn sprinkler gets the bike wet? Leave it out in the rain? Change the oil and keep the bike dry. If the problem comes back then go see the dealer.

Mar 19, 2009 | 2003 Yamaha YZ 125

1 Answer

Water leak/mixing with oil


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!

Mar 10, 2009 | Yamaha YZ 125 Motorcycles

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Water leak


water pump / inner,seal needs looking into .

Mar 10, 2009 | 2002 Yamaha YZ 426 F

2 Answers

Yamaha yz 125 2001.water leak


Yes, the water seal is leaking. This is the indicator hole for the water and oil seal.
Enjoy the ride !

Jon

Mar 01, 2009 | 2003 Yamaha YZ 125

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