transmission oil on ec250

[twibs]

the oil looks like it has a little water in it,it is slightly milky ,has always gone like this since i had the bike , changed the oil and after a bit it goes this colour
.
where can it get contaminated from ?,read somewhere bout non return valves ???? i found 2 rubber tubes off engine both are open ends. one finishes up by rad and other finishes in skid plate.

 

[rockyroad]

Water can enter through your breather hoses or it can be the coolant. I say you warm the engine, drain thoroughly, change the oil and route both hoses upward. Ride and avoid water crosses for a while to eliminate the possibility that this is the culprit. Water pump gasket(s) are next step IMO.