How can you not be using the rear brake?!?!? The rear brake is what settles the bike when braking hard into corners. If you're not using it you're either not riding hard enough or incorrectly. Even when coming to a stop at a set of lights you should be applying a little rear brake after having engaged the front brakes to help settle the bike. It's also a fact that using the rear and front brakes to stop in an emergency will make the bike stop in a shorter distance than if you had just used the front.