What does the motorcycle exhaust do? It basically aims the hot gases from the combustion chamber out and away from the motorcycle, helps to cool these gases, and helps the muffler subdue the normal combustion noises. Anyone who is looking to upgrade a motorcycle exhaust would be smart to search for the needed parts at a used motorcycle parts retailer. You can also find chrome motorcycle exhaust pipes which will dress up your bike and also help to improve the performance by helping the power from your engine work better. Luckily, it is not too difficult to change out a motorcycle exhaust system.