Be sure each spark plug wire's terminal is firmly connected to its spark plug. The wire cannot be wiggled or removed easily if it is connected correctly. Inspect each plug to verify its gap is correct.
What you also can check right now is the condition of the z-hose—a hose connecting the crankcase to the air box on the camshaft cover side of the engine. See the attached photo from Euro MotoElectrics. If it’s cracked and leaking, it will make the fuel mixture too lean resulting in the engine’s cutting out and often being hard to start. Leakage of the throttle body manifolds can also cause that, but checking those can come later.
There is more to verify in your future because you have "messed" with the throttle body screws but these two are a good beginning and might get you reliably rolling again, if the correct planets align.
