t’s almost like my engine is falling apart right now. 1 my exhaust gasket is leaking oil all over the place and even after I ordered a new gasket it still leaks oil. 2 (the biggest problem) the black ring that seals the crank case came out and while I was riding my crankcase kept popping pressure out of that seal which would instantly stall out the engine especially at full throttle I just put the seal back in and used the flat side of a chisel to gently hammer the ring back. 3. For some reason when I full throttle my engine it starst bogging at low speeds when I get to a higher speed it will then accelerate. 4. At around 34 kph my engine vibration tripled and then at around 39kph the vibration settles down and goes back to normal. When I’m at idle and rev it up at a certain rpm it vibrates a lot more and then once it passes that rpm vibration drops. If you have any help with these problems that would be gravely appreciated!