Yesterday i went out to start my quad to get ready to ride today. It usually starts right up. Well it didn't. Thought maybe it was low on gas. Put gas still nothing. Long story short i disconnected the breather hose that goes into the intake hose and it started right up. Re attached it and it stalls. WTF??? What could be the issue here? Could it be a bad oil return tank? I took the tank off and sprayed carb cleaner and reinstalled with no change. It also smells like gas coming out of the breather tube when running.