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I just bought (used) a CRF250X and after getting home I wanted to change out fluids before riding it. The tranny oil has water in it (milky) and now I'm scared . Has anyone seen this before, is it a simple seal or am I going to have to send her in for a total rebuild?

Are you sure it's from coolant? Has the bike been in water? Are you low on coolant? I might suggest if you don't know the history of the machine, clean it up and try it out. Change the oil several times and ride it a little bit. Drain the oil and do it again to see if the oil cleans up. Keep an eye on your coolant level.

The previous owner may have gotten water into the oil, so don't panic yet.

Joe

I really doubt that it is coolant as there aren't any places that coolant is near the tranny or kept from the tranny via a seal.

The fine clutch debris that gathers in tranny oil can also give tranny oil a 'milky' apearance.

Change it out, ride it enough to heat up the tranny oil well and drain it again. Repeat until you can see no signs of water.

Dana

My bet is, there is nothing wrong with the tranny, a lot of people post asking about how milky looking the tranny oil is. drain it, ride it for a few minutes and drain it again. you will see it is fine. How does it shift, how is the clutch?

Thanks for the input, my plan is to change the oil again (it did look better after the first change). If it doesn't seem to improve I am going to pull the clutch cover anyways (it seems to drag & I thought it was due to the milky oil) and replace the plates.

Keep the rubber side down!

The first time I changed my tranny oil it looked a bit like silver paint. Freaked me out. Asked around and found that this was "normal". I was running the Honda HP4 oil. I switched to another oil and it hasn't looked like that since. If yours had a silvery look to it, that may be "normal"

Joe