Don't worry about the coils. If you want to check anything on the coils start it up in a dark garage and look to see if there are any little sparks coming out of them. If there is you can either replace them or coat them with something like liquid electrical tape or just wrap them in a good cloth electrical tape. Check for a dirty air filter and we can go from there. Also as Deerkiller said a little more info of mods and jetting if you know would be helpful. Also did it start right after the valve adjustment? JMO but everyone here needs to stop all the valve adjustments unless there is a real issue requiring it. In almost every case when a valve adjustment is done it wasn't needed and it was a waste of time and money.
The only good thing about doing it is that with the tank off the bike you get a chance to see if the intake manifold is cracked and it gives you an opportunity to clean the top of the engine. But you can do that without pulling the covers.