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Yz 250 08 oil leak

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Good day all have a problem with my yz250 2008 model got an oil leak some were near the Pv cover I have redone my top end but it looks like tranny oil I'm stuck now need help ImageUploadedByThumper Talk1398064266.881760.jpg

ImageUploadedByThumper Talk1398064301.700419.jpg

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If it's trans oil, it's most likely from the PV actuator shaft seal where it goes through to the PV governor. Relatively easy to replace.

Edited by bg10459

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Thanks a lot I will give it a try this week I hope it works bike giving problems all the time but thanks again

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It could just be that cover seal letting your burnt premix drip out. Mine does that in the corner of the cover closest to the cylinder. I don't think that much tranny oil would come out of that top seal. Maybe though.

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I have a 08yz and the same spot leaks on mine, I bought a new gasket and put it on and it still leaks, I think it's comming from that rubber gasket that sit inbetween the pv cover. It's not tranny oil iTs burnt premix

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If your crank case breather is blocked it can force it's way out between the clutch cover and the center case at this location. If you have a leaky right side crank seal combined with a blocked breather, this will make the problem much worse. To diagnose, you can check the crank case breather is free easily enough, and diagnose leaking crank seals with a DIY leak tester (search for this) if clearing the breather doesn't resolve the trans oil leak.

As others have said, it can also be that the powervalve seal and/or pv shaft bore is worn. This will cause spooge (thick, black unbrurnt 2-stroke oil) to leak from this exact spot. Trans oil = crank case breather and possible crank seal. Sooge = worn pv seal and/or pv bore.

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