250-500cc Water in oil

what are the possible ways for water get in to the engine oil on the 300? was changing oil after yesterdays ride and it's not looking good...


we did have some deep water crossing and I do wash my bike often...also, combined with yesterday overheat and low water in the radiators, I am thinking I might have a problem..

thanks!
is it difficult fix?

I had (have?) the same problem, When I bought the bike I checked the oil and it was grey, changed it and in the next two rides or so grey again.... I've changed the rubber-seal from the power valve actuator arm and fitted the new one with some silicone. But I think the real problem was the plastic 'L' from the transmission breather hose, it was loose letting humidity in I think, I sealed it with some gasket sealer and now It's much better, checked the oil last day and it still has some himidity in, probably remaining from before.. I'm planning to extend this breather hose up to the tank and than back down, some water crossings can be deeper than that breather tube letting moisture direcly into the transmission.

What about simply plug that breather hole ? My other 2t bikes didn't had one ...

most likely water pump seal,just done mine yesterday.remember the impeller is left hand thread righty aint tighty lol. i heated my impeller up first was alot easier to undo.

My impeller came out very easy. Changed seal last night. Everything else looks new..

I am only missing gasket for left Powervalve cover to put it all back together. Can I use gasket maker for that one?

Also, while I am testing it, instead of putting expensive coolant, can I just put water in it? Or auto antifreeze?

so filtered bottle water for now to test things should be OK?

so..replacing just Oring did not fix the problem it seems...after filling up yesterday, coolant level is down again, my guess its in the transmission again. will check later tonight. I called Halls for the actual Seal that rides on the top of the bearing and another oring and all the necessary parts and he said 6-8 weeks for those, backordered.

so, the question is.. what do I do now..just use water in radiator and change oil before and after every ride and ride as usual? I am switching to cheap Rotella T 15-40 as per Rekluse recommendation anyhow.. $12 per gallon..

any other dealer that's known to have large stocks of parts?

you could try getting the correct size seal from a bearing and seal shop? providing you still have your old one to measure up against

That's what I always did ... It's the power of a 2t over a 4t bike and just about any oil will work in the tranny on a 2t...

But I did not have a rekluse ... So you make the call.
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Sorry but I can't quite follow your issue ... It is NOT the water pump seal?

When I took it

I am really not sure what caused it at this time. When i took it all apart, seal and oring looked just fine. I replaced oring and have seal coming in next week. Also, I sealed plastic vent connector.

I put fresh oil yesterday and rode around for 10 min and then dumped the oil. It looked ok and coolant level did not drop.. So I will just ride and continue to monitor this issue..

The dirt gods are favorable towards you today!

FYI: Sometimes my radiator fluid is a little low caused by the overflow hose spitting out water when I got the engine a little too hot ...

Do cars not have seals and o-rings? I have always run auto antifreeze in my bikes...

I am running spring water for now, until I am sure I can put good stuff back in it...I typically run engine ice in my bikes.

http://www.cyclegear.com/CycleGear/...-Performance-Motorcycle-Coolant/p/31295_00000

Dirtdame, can you send links to some of these articles? I'd like to see if this is something I should be concerned about. Right now I am not too worried, as the cooling system components on cars and bikes are pretty similar, but it would be good to know if I was missing something...