Motorcycle exhaust’s are noisier than usual if they need to be repaired or replaced. A dented exhaust can be unsightly, but repairing it is far cheaper than buying a new one. A hole in your motorcycle exhaust is a serious problem, however, and should be fixed by a professional even though you can do a temporary fix yourself.
Repairing a Dent - Remove the exhaust pipe by loosening the bolts that hold it in place.
Fill the exhaust with tap water once you have removed it.
Place the exhaust pipe in your freezer, which will freeze the water, causing it to expand and push the dent outward.
Check the exhaust pipe every four hours to see if the dent is disappearing. If it is still dented after 24 hours, thaw it, refill it with water and reposition it in the freezer. Sometimes this process needs to be repeated three or four times.
Repairing a Small Hole - Clean the hole with a wire brush to remove dirt and rust.
Cover the hole with a piece of wire mesh. The mesh should be slightly larger than the hole.
Apply the cold-weld compound according to the directions that come with the brand you bought. Allow it ample time to dry. Start the engine and listen for leaks.
Repairing a Large Hole - Cover the hole with a sheet of metal. You can purchase one or use scrap metal.
Apply the muffler clamps over the metal sheet to attach it tightly to the exhaust. Do not tighten it too much, as you can further damage your exhaust pipe.
Start your motorcycle and listen to it. If the clamps are attached securely, the exhaust should run quietly.