Don't forget that since the less wider tire was used (because of the minimizing of the space between the bags to limit the Tourer's width) it will be hard to put a car tire or the regular Rocket tire (Mr. 240) in it's place without some serious modification which could/would result in the Tourer being wider than it's current form.
Now if there is a higher speed rated tire the same size as the current Tourer's tire size then you might be going in the right direction if what Pig9r says about the tune and throttle bodies can be overcome. But at $2,400 for a new set, gonna be costly.
Dennis