crankcase leakage?

[dimtsam]

Hello everyone.
My GasGas was smoking a lot at my last ride so I decided to do a leakage test. When I put air to the intake it holds no pressure at all and if i put my hand to the oil fill, i feel the air coming out from there.
Then i opened the right side of the engine and put some soap water to the crankshaft seal and saw no bubbles.
My mind is going to the crankcase gasket.
Is there anything else to check before I start to split the crankcase?

Thanks a lot

 

[(F5)]

Hmm
I'd want to do an actual leak down test. Your method seems parsimonious at best. No offense but. . .

Are you losing gear oil?

Pull your muffler apart. Repackaging it and burn out the perforated core. The carbon and goop there can look like an Amazon fire with assistance from BP..

 

[dimtsam]

Yes i think gear oil is missing.

 

[(F5)]

That's enough to do so. Real easy to separate, at least my 07 has the rollers so no puller needed.

 

[Zman]

1. Do you have much up and down play in the crank bearing on that side? If the crank bearings are worn and loose the deflection from running may cause the seal to leak. Is the bottom end original from 2007?
2. Check the case bolts on the ignition side to see if any are loose.