Head gasket/piston rings??

The problem I have is that my gilera runner 172 doesn't want to start. Lost a tiny bit of compression, but there is oily fuel all over the exhaust by the head, when it does start it's not for long and doesn't rev right. I originally thought it was just over fueling but now having doubts. Can anyone help?

 

Pull the barrel off and have a look!

 

Will do mate, just seein if someone has had the same problem so I don't have to fork out the money when I don't need to

 

mine spits oil all over the head as most pipes leak at the manifold and i run mine oil rich

as said its not the hardest job so buy a new gasket set and open her up