i just bought a '03 400ex this past sunday, the dealer was closed sunday so i couldnt change the oil and filter, so i rode it as it was. then towards the end of my ride i noticed white smoke coming out. i let it sit until today when i changed the oil, and oil filter, and cleaned the air filter. i was worried that the rings might be bad, but when i drained the oil it had some milky parts in it..im pretty sure this is water right? and when i put the new oil in when i pulled the dipstick out it had lots of bubbles all over it..water again right? should i just keep changing the oil until the bubbles are gone? or is there somethin else you can do for this. also it doesnt smoke that bad, and only smokes with you blip the throttle..not really when you just hold it steady.

 

Any time I get water in the engine I drain and refill 6 times just to be safe.

 

Yeah your going to have to do it multiple times. Just use cheap oil until its clean then add the good stuff.

 

alright, thanks guys..i guess ill just keep changing it till the oil looks clean lol...what do you do with the oil filters?

and do you think this could be the cause of the white smoke? we held cardboard behind the exhuast and a black liquid showed up on the back..wasnt thick like oil though

 

Are you draining both the tank and the crakcase????

I wouldn't freak out about just "bubbles". When you start a cold engine up, the oil is thick and can't get the bubbles out very well until it warms up. If it is still "milky", then that is something to worry about, and I would do several oil changes as has been suggested.

Are you thinking there is a lot of water in there (like from a stream crossing), or maybe just a lot of condensation??? Perhaps your crankcase breather isn't working properly???

http://www.atvriders.com/articles/oilchange400ex.html

 

Just run the cheap oil like mentioned and drain it again and put the good in and also change you plug.

 

change the filter every other time.