Removing your muffler (aka resonator) will change the tuning of your motorcycle, as the back pressure ties into the performance of the engine. Typically, vehicles will run just fine without a muffler, though you may be in violation of local noise ordinances, as it makes your motorcycle MUCH louder. Running straight exhaust pipes (no muffler) on motorcycles is pretty common practice. A universal baffle can be easily installed in a straight pipe to help reduce the sound, though it will not be as quiet as with a muffler.