Water leak from my engine yz 125

it mite but no garantee-fluid can ruin bearings--do u hav a repair manual --some cracks cant be fixed--send complete details to [email protected] best

engine leak down is crucial on two stroke just as much as cylinder compression is engine compression fix the leak first and check for others - spray soapy water over to spot any leaks and kick over with plug disconnected you will see bubbles appear

your water pump shaft runs threw bearing and seal,and your seal is bad,not to big of job to replace,you can order part off bike-bandit.com( they also have a breakdown of parts picture you can look at to help in seeing what needs to be removed to fix) and it will be ok to ride as long as you do not let the colant run out( no colant =overheat=locked up engine.) so check colant every 5-min of riding untill you fix.....

It has seals there for the water pump. They need to be replaced.

yes thats a tell tale hole to let you know its leaking!!! :)

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.

when oil becomes creamy or foamy it is a sighn that you are getting moisture in it. you must have water leaking into your oil. you should fix the problem soon because your oil will not work properly with an excess if moisture in it.

water pump / inner,seal needs looking into .

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

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

Jon