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Either your Water Pump seals have gone or your Head Gasket is leaking or the Head itself has a crack in it. I have also seen the crank seals leaking, being a cause of this. Are you getting excessive white / blue smoke from the exhaust ? Is the bike using water / coolant ? Is the Throttle response poor mid rev range ?
Could be all of the above or one, unfortunately without more info its impossible to diagnose the exact one. But i would defo check out the Head / Head Gasket first, run the bike (10 / 15 mins), drain the oil, check the condition of it. If its still the same, it's more than likely going to be the Water Pump seals.
Hope this helps,
Andy....
What else can I help you with?
Why is there a White milky sludge on my oil cap?
whenever water is mixed with oil in a crankcase the heat turns the water into a vapor and this allows oil and water to mix and that is the milky looking substance you see... check for cracks or bad gaskets if the motor is water cooled and buy a dryer agent if it's not... it could be just condensation but enough of that will damage your motor real bad... it lowers the viscosity of the oil and that can lead to big problems!
What weight fork oil for 1986 kx125?
SAE 10 weight oil
Why has unused motor oil gone milky?
My guess would be that if has gotten moisture in it. Were the oil bottles sealed? Also how old if the oil?
You have white smoke on start up loss of antifreeze milky oil but no smoke when engine is hot?
White smoke at startup, loss of anti freeze and milky oil indicates to me a bad head gasket.
What would motor oil look like in coolant - that is would it appear to the eye as just oil floating on surface?
It might, or it might turn the coolant white or milky or it can end up being dark brown globs.
What kind of oil should you put in your 1997 kx125?
racing oil would be the best
How do you find out What is causing my motor oil to look like milk?
Check your coolant. Typically milky oil is a sign of a bad head gasket.
How much oil does a crank case hold on a 93 kx125?
1 quart
What color is water in the oil of your outboard motor?
White
Milky anti freeze?
Milky anti-freeze is usually an indication that motor oil is getting into the cooling system, probably through a bad head gasket or a cracked block or head.
What is all the reasons that your oil could be milky on an inboard outboard boat motor?
The boat does still go full throtle
What does it mean when the oil in your lawnmower looks milky or white?
When the oil in your lawnmower appears milky or white, it typically indicates that water has mixed with the oil. This can happen due to a leaking gasket, a damaged seal, or condensation buildup, which is especially common in humid conditions. Milky oil can reduce the lubrication effectiveness, potentially leading to engine damage, so it's essential to drain the contaminated oil and address any underlying issues before continuing to use the mower.
