if you are going to have it done, send it to a builder he will redo it, like change squish band clearance, rechamber, look at wildcards review, timsyfz has a pic of his head, and yes it helps, you bike is going to run better because of the way it is designed it gets the combustion chamber right before detonation, which makes your bike get the most use out of ur fuel. which in turn is going to make the bike run much better than a stock head, which in turn is poorly designed, not to get off topic but yamaha took a high performing bike and dummed it down to a kids bike. but i also reccomend the port work, will help the motor breathe and react much better. depending on the port job