Is that half moon missing? Or got pulled inward?
Any other non stock modifications? Crankcase ventilation stock?
I didnt check that because i dont know abaut that breathers jajaja , if you have any picture of them to know how are them or to know what im going to check y apreciate thatYeah sorry, I figured because of the photo it was still there. There are breathers on top of the cam covers that should prevent this. Have you checked them?