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2010 TM 85 2 stroke oil leaking issues.

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Hey people. 


As above I have what I thought was a right side crank seal leak and I thought it was pressurising the crankcases in the tranmission as oil has been leaking from what appears to be the oil breather tube in the top of the crankcases behind the cylinder head. I pressure tested the cases and it appears that the seals are fine. It held 10 psi for 10 minutes, with no leaks. What would make oil come out the crancse breather tube?


Many thanks in advance.









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