2006 Gas Gas Pampera 400 oil leak from the breather hose
 

Hello everyone, I'm a new user of the forum, I'm Italian, so I apologize for any errors in writing.
I recently bought a 2006 Pampera 400 gas gas and noticed a massive oil leak from the breather hose on the cam cover.
The motorcycle also leaks if the oil level drops below the minimum level.
I can't figure out what could be causing this problem, much less how to fix it.
Can someone who knows more about this give me some advice?

My 1971 model year Honda SL100 broke a piston ring, and it wore a big hole in the cylinder, allowing exhaust gas to pass by and pressurize the crankcase.

It would blow exhaust and oil out the crankcase breather (the cylinder head wasn't vented.)

Have you checked compression?

Have you had the cam cover off? Have you checked for any missing baffle to keep oil inside the cam cavity?

Hi, thanks for the advice.
I removed the cam cover and it seems like nothing is missing, now I'm getting ready to do a compression test to check if the piston rings still have a good seal.
I just have to mount the flywheel and starter motor to make sure the engine turns and read the compression data.